diff --git a/src/cmd/cgo/gcc.go b/src/cmd/cgo/gcc.go
index 1864eed09af..97297a86045 100644
--- a/src/cmd/cgo/gcc.go
+++ b/src/cmd/cgo/gcc.go
@@ -71,7 +71,7 @@ func (p *Package) ParseFlags(f *File, srcfile string) {
 NextLine:
 	for _, line := range linesIn {
 		l := strings.TrimSpace(line)
-		if len(l) < 5 || l[:4] != "#cgo" || !unicode.IsSpace(int(l[4])) {
+		if len(l) < 5 || l[:4] != "#cgo" || !unicode.IsSpace(rune(l[4])) {
 			linesOut = append(linesOut, line)
 			continue
 		}
@@ -193,28 +193,28 @@ func pkgConfig(packages []string) (cflags, ldflags []string, err os.Error) {
 //
 func splitQuoted(s string) (r []string, err os.Error) {
 	var args []string
-	arg := make([]int, len(s))
+	arg := make([]rune, len(s))
 	escaped := false
 	quoted := false
-	quote := 0
+	quote := rune(0)
 	i := 0
-	for _, rune := range s {
+	for _, r := range s {
 		switch {
 		case escaped:
 			escaped = false
-		case rune == '\\':
+		case r == '\\':
 			escaped = true
 			continue
 		case quote != 0:
-			if rune == quote {
+			if r == quote {
 				quote = 0
 				continue
 			}
-		case rune == '"' || rune == '\'':
+		case r == '"' || r == '\'':
 			quoted = true
-			quote = rune
+			quote = r
 			continue
-		case unicode.IsSpace(rune):
+		case unicode.IsSpace(r):
 			if quoted || i > 0 {
 				quoted = false
 				args = append(args, string(arg[:i]))
@@ -222,7 +222,7 @@ func splitQuoted(s string) (r []string, err os.Error) {
 			}
 			continue
 		}
-		arg[i] = rune
+		arg[i] = r
 		i++
 	}
 	if quoted || i > 0 {
diff --git a/src/cmd/cgo/util.go b/src/cmd/cgo/util.go
index e79b0e1bfae..a9c4e8fde7c 100644
--- a/src/cmd/cgo/util.go
+++ b/src/cmd/cgo/util.go
@@ -102,7 +102,7 @@ func creat(name string) *os.File {
 	return f
 }
 
-func slashToUnderscore(c int) int {
+func slashToUnderscore(c rune) rune {
 	if c == '/' || c == '\\' || c == ':' {
 		c = '_'
 	}
diff --git a/src/cmd/goyacc/goyacc.go b/src/cmd/goyacc/goyacc.go
index 4ce0c73703e..d1a90798123 100644
--- a/src/cmd/goyacc/goyacc.go
+++ b/src/cmd/goyacc/goyacc.go
@@ -813,7 +813,8 @@ func defin(nt int, s string) int {
 var peekline = 0
 
 func gettok() int {
-	var i, match, c int
+	var i int
+	var match, c rune
 
 	tokname = ""
 	for {
@@ -919,25 +920,25 @@ func gettok() int {
 
 		getword(c)
 		// find a reserved word
-		for c = 0; c < len(resrv); c++ {
-			if tokname == resrv[c].name {
+		for i := range resrv {
+			if tokname == resrv[i].name {
 				if tokflag {
 					fmt.Printf(">>> %%%v %v %v\n", tokname,
-						resrv[c].value-PRIVATE, lineno)
+						resrv[i].value-PRIVATE, lineno)
 				}
-				return resrv[c].value
+				return resrv[i].value
 			}
 		}
 		errorf("invalid escape, or illegal reserved word: %v", tokname)
 
 	case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
-		numbval = c - '0'
+		numbval = int(c - '0')
 		for {
 			c = getrune(finput)
 			if !isdigit(c) {
 				break
 			}
-			numbval = numbval*10 + c - '0'
+			numbval = numbval*10 + int(c-'0')
 		}
 		ungetrune(finput, c)
 		if tokflag {
@@ -953,7 +954,7 @@ func gettok() int {
 		if tokflag {
 			fmt.Printf(">>> OPERATOR %v %v\n", string(c), lineno)
 		}
-		return c
+		return int(c)
 	}
 
 	// look ahead to distinguish IDENTIFIER from IDENTCOLON
@@ -982,7 +983,7 @@ func gettok() int {
 	return IDENTIFIER
 }
 
-func getword(c int) {
+func getword(c rune) {
 	tokname = ""
 	for isword(c) || isdigit(c) || c == '_' || c == '.' || c == '$' {
 		tokname += string(c)
@@ -1107,7 +1108,7 @@ func cpycode() {
 // skipcom is called after reading a '/'
 //
 func skipcom() int {
-	var c int
+	var c rune
 
 	c = getrune(finput)
 	if c == '/' {
@@ -1221,7 +1222,7 @@ loop:
 			j := 0
 			if isdigit(c) {
 				for isdigit(c) {
-					j = j*10 + c - '0'
+					j = j*10 + int(c-'0')
 					c = getrune(finput)
 				}
 				ungetrune(finput, c)
@@ -2837,10 +2838,10 @@ func others() {
 	fmt.Fprintf(ftable, "%d,\n}\n", 0)
 
 	// copy parser text
-	c = getrune(finput)
-	for c != EOF {
-		ftable.WriteRune(c)
-		c = getrune(finput)
+	ch := getrune(finput)
+	for ch != EOF {
+		ftable.WriteRune(ch)
+		ch = getrune(finput)
 	}
 
 	// copy yaccpar
@@ -2976,11 +2977,11 @@ func prlook(p Lkset) {
 //
 // utility routines
 //
-var peekrune int
+var peekrune rune
 
-func isdigit(c int) bool { return c >= '0' && c <= '9' }
+func isdigit(c rune) bool { return c >= '0' && c <= '9' }
 
-func isword(c int) bool {
+func isword(c rune) bool {
 	return c >= 0xa0 || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')
 }
 
@@ -3010,8 +3011,8 @@ func putrune(f *bufio.Writer, c int) {
 	}
 }
 
-func getrune(f *bufio.Reader) int {
-	var r int
+func getrune(f *bufio.Reader) rune {
+	var r rune
 
 	if peekrune != 0 {
 		if peekrune == EOF {
@@ -3033,7 +3034,7 @@ func getrune(f *bufio.Reader) int {
 	return c
 }
 
-func ungetrune(f *bufio.Reader, c int) {
+func ungetrune(f *bufio.Reader, c rune) {
 	if f != finput {
 		panic("ungetc - not finput")
 	}
diff --git a/src/pkg/go/build/dir.go b/src/pkg/go/build/dir.go
index 3ee10ab3484..b67f999b766 100644
--- a/src/pkg/go/build/dir.go
+++ b/src/pkg/go/build/dir.go
@@ -461,10 +461,10 @@ func safeName(s string) bool {
 //
 func splitQuoted(s string) (r []string, err os.Error) {
 	var args []string
-	arg := make([]int, len(s))
+	arg := make([]rune, len(s))
 	escaped := false
 	quoted := false
-	quote := 0
+	quote := rune(0)
 	i := 0
 	for _, rune := range s {
 		switch {
diff --git a/src/pkg/html/entity.go b/src/pkg/html/entity.go
index 21263e22d8c..bd830752359 100644
--- a/src/pkg/html/entity.go
+++ b/src/pkg/html/entity.go
@@ -13,7 +13,7 @@ const longestEntityWithoutSemicolon = 6
 //
 // Note that the HTML5 list is larger than the HTML4 list at
 // http://www.w3.org/TR/html4/sgml/entities.html
-var entity = map[string]int{
+var entity = map[string]rune{
 	"AElig;":                           '\U000000C6',
 	"AMP;":                             '\U00000026',
 	"Aacute;":                          '\U000000C1',
@@ -2155,7 +2155,7 @@ var entity = map[string]int{
 }
 
 // HTML entities that are two unicode codepoints.
-var entity2 = map[string][2]int{
+var entity2 = map[string][2]rune{
 	// TODO(nigeltao): Handle replacements that are wider than their names.
 	// "nLt;":                     {'\u226A', '\u20D2'},
 	// "nGt;":                     {'\u226B', '\u20D2'},
diff --git a/src/pkg/html/escape.go b/src/pkg/html/escape.go
index e9edc474da5..69e0028e445 100644
--- a/src/pkg/html/escape.go
+++ b/src/pkg/html/escape.go
@@ -14,7 +14,7 @@ import (
 // These replacements permit compatibility with old numeric entities that 
 // assumed Windows-1252 encoding.
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/tokenization.html#consume-a-character-reference
-var replacementTable = [...]int{
+var replacementTable = [...]rune{
 	'\u20AC', // First entry is what 0x80 should be replaced with.
 	'\u0081',
 	'\u201A',
@@ -79,23 +79,23 @@ func unescapeEntity(b []byte, dst, src int, attribute bool) (dst1, src1 int) {
 			i++
 		}
 
-		x := 0
+		x := rune(0)
 		for i < len(s) {
 			c = s[i]
 			i++
 			if hex {
 				if '0' <= c && c <= '9' {
-					x = 16*x + int(c) - '0'
+					x = 16*x + rune(c) - '0'
 					continue
 				} else if 'a' <= c && c <= 'f' {
-					x = 16*x + int(c) - 'a' + 10
+					x = 16*x + rune(c) - 'a' + 10
 					continue
 				} else if 'A' <= c && c <= 'F' {
-					x = 16*x + int(c) - 'A' + 10
+					x = 16*x + rune(c) - 'A' + 10
 					continue
 				}
 			} else if '0' <= c && c <= '9' {
-				x = 10*x + int(c) - '0'
+				x = 10*x + rune(c) - '0'
 				continue
 			}
 			if c != ';' {
diff --git a/src/pkg/http/cgi/host.go b/src/pkg/http/cgi/host.go
index 9ea4c9d8bf2..365a712dfa8 100644
--- a/src/pkg/http/cgi/host.go
+++ b/src/pkg/http/cgi/host.go
@@ -333,18 +333,18 @@ func (h *Handler) handleInternalRedirect(rw http.ResponseWriter, req *http.Reque
 	h.PathLocationHandler.ServeHTTP(rw, newReq)
 }
 
-func upperCaseAndUnderscore(rune int) int {
+func upperCaseAndUnderscore(r rune) rune {
 	switch {
-	case rune >= 'a' && rune <= 'z':
-		return rune - ('a' - 'A')
-	case rune == '-':
+	case r >= 'a' && r <= 'z':
+		return r - ('a' - 'A')
+	case r == '-':
 		return '_'
-	case rune == '=':
+	case r == '=':
 		// Maybe not part of the CGI 'spec' but would mess up
 		// the environment in any case, as Go represents the
 		// environment as a slice of "key=value" strings.
 		return '_'
 	}
 	// TODO: other transformations in spec or practice?
-	return rune
+	return r
 }
diff --git a/src/pkg/path/filepath/match.go b/src/pkg/path/filepath/match.go
index 0ccc87e6560..15c84a7e985 100644
--- a/src/pkg/path/filepath/match.go
+++ b/src/pkg/path/filepath/match.go
@@ -136,7 +136,7 @@ func matchChunk(chunk, s string) (rest string, ok bool, err os.Error) {
 					chunk = chunk[1:]
 					break
 				}
-				var lo, hi int
+				var lo, hi rune
 				if lo, chunk, err = getEsc(chunk); err != nil {
 					return
 				}
@@ -183,7 +183,7 @@ func matchChunk(chunk, s string) (rest string, ok bool, err os.Error) {
 }
 
 // getEsc gets a possibly-escaped character from chunk, for a character class.
-func getEsc(chunk string) (r int, nchunk string, err os.Error) {
+func getEsc(chunk string) (r rune, nchunk string, err os.Error) {
 	if len(chunk) == 0 || chunk[0] == '-' || chunk[0] == ']' {
 		err = ErrBadPattern
 		return
diff --git a/src/pkg/path/match.go b/src/pkg/path/match.go
index efb8c5ce7fc..e9d032799fe 100644
--- a/src/pkg/path/match.go
+++ b/src/pkg/path/match.go
@@ -136,7 +136,7 @@ func matchChunk(chunk, s string) (rest string, ok bool, err os.Error) {
 					chunk = chunk[1:]
 					break
 				}
-				var lo, hi int
+				var lo, hi rune
 				if lo, chunk, err = getEsc(chunk); err != nil {
 					return
 				}
@@ -183,7 +183,7 @@ func matchChunk(chunk, s string) (rest string, ok bool, err os.Error) {
 }
 
 // getEsc gets a possibly-escaped character from chunk, for a character class.
-func getEsc(chunk string) (r int, nchunk string, err os.Error) {
+func getEsc(chunk string) (r rune, nchunk string, err os.Error) {
 	if len(chunk) == 0 || chunk[0] == '-' || chunk[0] == ']' {
 		err = ErrBadPattern
 		return
diff --git a/src/pkg/syscall/exec_windows.go b/src/pkg/syscall/exec_windows.go
index e8b540ad160..e4fafdb9924 100644
--- a/src/pkg/syscall/exec_windows.go
+++ b/src/pkg/syscall/exec_windows.go
@@ -100,7 +100,7 @@ func makeCmdLine(args []string) string {
 // Last bytes are two UCS-2 NULs, or four NUL bytes.
 func createEnvBlock(envv []string) *uint16 {
 	if len(envv) == 0 {
-		return &utf16.Encode([]int("\x00\x00"))[0]
+		return &utf16.Encode([]rune("\x00\x00"))[0]
 	}
 	length := 0
 	for _, s := range envv {
@@ -118,7 +118,7 @@ func createEnvBlock(envv []string) *uint16 {
 	}
 	copy(b[i:i+1], []byte{0})
 
-	return &utf16.Encode([]int(string(b)))[0]
+	return &utf16.Encode([]rune(string(b)))[0]
 }
 
 func CloseOnExec(fd Handle) {
diff --git a/src/pkg/syscall/syscall_windows.go b/src/pkg/syscall/syscall_windows.go
index 25e90eb6f36..ea62df6a1f2 100644
--- a/src/pkg/syscall/syscall_windows.go
+++ b/src/pkg/syscall/syscall_windows.go
@@ -56,7 +56,7 @@ func main() {
 
 // StringToUTF16 returns the UTF-16 encoding of the UTF-8 string s,
 // with a terminating NUL added.
-func StringToUTF16(s string) []uint16 { return utf16.Encode([]int(s + "\x00")) }
+func StringToUTF16(s string) []uint16 { return utf16.Encode([]rune(s + "\x00")) }
 
 // UTF16ToString returns the UTF-8 encoding of the UTF-16 sequence s,
 // with a terminating NUL removed.
diff --git a/src/pkg/testing/quick/quick.go b/src/pkg/testing/quick/quick.go
index 756a60e1352..9ec1925de3d 100644
--- a/src/pkg/testing/quick/quick.go
+++ b/src/pkg/testing/quick/quick.go
@@ -123,9 +123,9 @@ func Value(t reflect.Type, rand *rand.Rand) (value reflect.Value, ok bool) {
 		return s, true
 	case reflect.String:
 		numChars := rand.Intn(complexSize)
-		codePoints := make([]int, numChars)
+		codePoints := make([]rune, numChars)
 		for i := 0; i < numChars; i++ {
-			codePoints[i] = rand.Intn(0x10ffff)
+			codePoints[i] = rune(rand.Intn(0x10ffff))
 		}
 		return reflect.ValueOf(string(codePoints)), true
 	case reflect.Struct:
diff --git a/test/convlit.go b/test/convlit.go
index 90ac5490c84..2e3b15bda10 100644
--- a/test/convlit.go
+++ b/test/convlit.go
@@ -36,7 +36,7 @@ var good3 int = 1e9
 var good4 float64 = 1e20
 
 // explicit conversion of string is okay
-var _ = []int("abc")
+var _ = []rune("abc")
 var _ = []byte("abc")
 
 // implicit is not
@@ -47,20 +47,20 @@ var _ []byte = "abc" // ERROR "cannot use|incompatible|invalid"
 type Tstring string
 
 var ss Tstring = "abc"
-var _ = []int(ss)
+var _ = []rune(ss)
 var _ = []byte(ss)
 
 // implicit is still not
-var _ []int = ss  // ERROR "cannot use|incompatible|invalid"
+var _ []rune = ss // ERROR "cannot use|incompatible|invalid"
 var _ []byte = ss // ERROR "cannot use|incompatible|invalid"
 
 // named slice is not
-type Tint []int
+type Trune []rune
 type Tbyte []byte
 
-var _ = Tint("abc")  // ERROR "convert|incompatible|invalid"
+var _ = Trune("abc") // ERROR "convert|incompatible|invalid"
 var _ = Tbyte("abc") // ERROR "convert|incompatible|invalid"
 
 // implicit is still not
-var _ Tint = "abc"  // ERROR "cannot use|incompatible|invalid"
+var _ Trune = "abc" // ERROR "cannot use|incompatible|invalid"
 var _ Tbyte = "abc" // ERROR "cannot use|incompatible|invalid"
diff --git a/test/fixedbugs/bug204.go b/test/fixedbugs/bug204.go
index d4534c27c56..adf0aafd6b2 100644
--- a/test/fixedbugs/bug204.go
+++ b/test/fixedbugs/bug204.go
@@ -7,18 +7,18 @@
 package main
 
 func main() {
-	nchar := 0;
-	a := []int { '日', '本', '語', 0xFFFD };
+	nchar := 0
+	a := []rune{'日', '本', '語', 0xFFFD}
 	for _, char := range "日本語\xc0" {
 		if nchar >= len(a) {
-			println("BUG");
-			break;
+			println("BUG")
+			break
 		}
 		if char != a[nchar] {
-			println("expected", a[nchar], "got", char);
-			println("BUG");
-			break;
+			println("expected", a[nchar], "got", char)
+			println("BUG")
+			break
 		}
-		nchar++;
+		nchar++
 	}
 }
diff --git a/test/ken/string.go b/test/ken/string.go
index cbedad4e882..b74bd7d6f1c 100644
--- a/test/ken/string.go
+++ b/test/ken/string.go
@@ -95,7 +95,7 @@ func main() {
 	}
 
 	/* create string with int array */
-	var z2 [3]int
+	var z2 [3]rune
 	z2[0] = 'a'
 	z2[1] = '\u1234'
 	z2[2] = 'c'
diff --git a/test/range.go b/test/range.go
index 91ccd6307a5..84119450b28 100644
--- a/test/range.go
+++ b/test/range.go
@@ -172,7 +172,7 @@ func makestring() string {
 }
 
 func teststring() {
-	s := 0
+	var s rune
 	nmake = 0
 	for _, v := range makestring() {
 		s += v
@@ -208,7 +208,7 @@ func teststring1() {
 
 func makemap() map[int]int {
 	nmake++
-	return map[int]int{0:'a', 1:'b', 2:'c', 3:'d', 4:'☺'}
+	return map[int]int{0: 'a', 1: 'b', 2: 'c', 3: 'd', 4: '☺'}
 }
 
 func testmap() {
diff --git a/test/solitaire.go b/test/solitaire.go
index c789bf24a0f..473a1d12d7d 100644
--- a/test/solitaire.go
+++ b/test/solitaire.go
@@ -14,7 +14,7 @@ const N = 11 + 1 // length of a board row (+1 for newline)
 // The board must be surrounded by 2 illegal fields in each direction
 // so that move() doesn't need to check the board boundaries. Periods
 // represent illegal fields, ● are pegs, and ○ are holes.
-var board = []int(
+var board = []rune(
 	`...........
 ...........
 ....●●●....
@@ -28,7 +28,6 @@ var board = []int(
 ...........
 `)
 
-
 // center is the position of the center hole if there is a single one;
 // otherwise it is -1.
 var center int
@@ -46,7 +45,6 @@ func init() {
 	}
 }
 
-
 var moves int // number of times move is called
 
 // move tests if there is a peg at position pos that can jump over another peg
@@ -63,7 +61,6 @@ func move(pos, dir int) bool {
 	return false
 }
 
-
 // unmove reverts a previously executed valid move.
 func unmove(pos, dir int) {
 	board[pos] = '●'
@@ -71,7 +68,6 @@ func unmove(pos, dir int) {
 	board[pos+2*dir] = '○'
 }
 
-
 // solve tries to find a sequence of moves such that there is only one peg left
 // at the end; if center is >= 0, that last peg must be in the center position.
 // If a solution is found, solve prints the board after each move in a backward
@@ -110,7 +106,6 @@ func solve() bool {
 	return false
 }
 
-
 func main() {
 	if !solve() {
 		println("no solution found")
diff --git a/test/string_lit.go b/test/string_lit.go
index 4358dd8e822..c702a05e91f 100644
--- a/test/string_lit.go
+++ b/test/string_lit.go
@@ -35,14 +35,14 @@ func assert(a, b, c string) {
 }
 
 const (
-	gx1 = "aä本☺"
-	gx2 = "aä\xFF\xFF本☺"
+	gx1    = "aä本☺"
+	gx2    = "aä\xFF\xFF本☺"
 	gx2fix = "aä\uFFFD\uFFFD本☺"
 )
 
 var (
-	gr1 = []int(gx1)
-	gr2 = []int(gx2)
+	gr1 = []rune(gx1)
+	gr2 = []rune(gx2)
 	gb1 = []byte(gx1)
 	gb2 = []byte(gx2)
 )
@@ -93,26 +93,26 @@ func main() {
 
 	// test large runes. perhaps not the most logical place for this test.
 	var r int32
-	r = 0x10ffff;	// largest rune value
+	r = 0x10ffff // largest rune value
 	s = string(r)
 	assert(s, "\xf4\x8f\xbf\xbf", "largest rune")
 	r = 0x10ffff + 1
 	s = string(r)
 	assert(s, "\xef\xbf\xbd", "too-large rune")
 
-	assert(string(gr1), gx1, "global ->[]int")
-	assert(string(gr2), gx2fix, "global invalid ->[]int")
+	assert(string(gr1), gx1, "global ->[]rune")
+	assert(string(gr2), gx2fix, "global invalid ->[]rune")
 	assert(string(gb1), gx1, "->[]byte")
 	assert(string(gb2), gx2, "global invalid ->[]byte")
 
 	var (
-		r1 = []int(gx1)
-		r2 = []int(gx2)
+		r1 = []rune(gx1)
+		r2 = []rune(gx2)
 		b1 = []byte(gx1)
 		b2 = []byte(gx2)
 	)
-	assert(string(r1), gx1, "->[]int")
-	assert(string(r2), gx2fix, "invalid ->[]int")
+	assert(string(r1), gx1, "->[]rune")
+	assert(string(r2), gx2fix, "invalid ->[]rune")
 	assert(string(b1), gx1, "->[]byte")
 	assert(string(b2), gx2, "invalid ->[]byte")
 
diff --git a/test/stringrange.go b/test/stringrange.go
index d5ada2628df..924022b48e7 100644
--- a/test/stringrange.go
+++ b/test/stringrange.go
@@ -14,23 +14,24 @@ import (
 
 func main() {
 	s := "\000\123\x00\xca\xFE\u0123\ubabe\U0000babe\U0010FFFFx"
-	expect := []int{ 0, 0123, 0, 0xFFFD, 0xFFFD, 0x123, 0xbabe, 0xbabe, 0x10FFFF, 'x' }
+	expect := []rune{0, 0123, 0, 0xFFFD, 0xFFFD, 0x123, 0xbabe, 0xbabe, 0x10FFFF, 'x'}
 	offset := 0
-	var i, c int
+	var i int
+	var c rune
 	ok := true
 	cnum := 0
 	for i, c = range s {
-		rune, size := utf8.DecodeRuneInString(s[i:len(s)])  // check it another way
+		r, size := utf8.DecodeRuneInString(s[i:len(s)]) // check it another way
 		if i != offset {
 			fmt.Printf("unexpected offset %d not %d\n", i, offset)
 			ok = false
 		}
-		if rune != expect[cnum] {
-			fmt.Printf("unexpected rune %d from DecodeRuneInString: %x not %x\n", i, rune, expect[cnum])
+		if r != expect[cnum] {
+			fmt.Printf("unexpected rune %d from DecodeRuneInString: %x not %x\n", i, r, expect[cnum])
 			ok = false
 		}
 		if c != expect[cnum] {
-			fmt.Printf("unexpected rune %d from range: %x not %x\n", i, rune, expect[cnum])
+			fmt.Printf("unexpected rune %d from range: %x not %x\n", i, r, expect[cnum])
 			ok = false
 		}
 		offset += size
diff --git a/test/utf.go b/test/utf.go
index a93fc293416..ed8a983d8f1 100644
--- a/test/utf.go
+++ b/test/utf.go
@@ -9,7 +9,7 @@ package main
 import "utf8"
 
 func main() {
-	var chars [6] int
+	var chars [6]rune
 	chars[0] = 'a'
 	chars[1] = 'b'
 	chars[2] = 'c'
@@ -21,16 +21,22 @@ func main() {
 		s += string(chars[i])
 	}
 	var l = len(s)
-	for w, i, j := 0,0,0; i < l; i += w {
-		var r int
+	for w, i, j := 0, 0, 0; i < l; i += w {
+		var r rune
 		r, w = utf8.DecodeRuneInString(s[i:len(s)])
-		if w == 0 { panic("zero width in string") }
-		if r != chars[j] { panic("wrong value from string") }
+		if w == 0 {
+			panic("zero width in string")
+		}
+		if r != chars[j] {
+			panic("wrong value from string")
+		}
 		j++
 	}
 	// encoded as bytes:  'a' 'b' 'c' e6 97 a5 e6 9c ac e8 aa 9e
 	const L = 12
-	if L != l { panic("wrong length constructing array") }
+	if L != l {
+		panic("wrong length constructing array")
+	}
 	a := make([]byte, L)
 	a[0] = 'a'
 	a[1] = 'b'
@@ -44,11 +50,15 @@ func main() {
 	a[9] = 0xe8
 	a[10] = 0xaa
 	a[11] = 0x9e
-	for w, i, j := 0,0,0; i < L; i += w {
-		var r int
+	for w, i, j := 0, 0, 0; i < L; i += w {
+		var r rune
 		r, w = utf8.DecodeRune(a[i:L])
-		if w == 0 { panic("zero width in bytes") }
-		if r != chars[j] { panic("wrong value from bytes") }
+		if w == 0 {
+			panic("zero width in bytes")
+		}
+		if r != chars[j] {
+			panic("wrong value from bytes")
+		}
 		j++
 	}
 }