Reverse a string in Go

Reverses by runes rather than bytes, which is the only way that works for non-ASCII.

func reverse(s string) string {
    runes := []rune(s)
    for i, j := 0, len(runes)-1; i < j; i, j = i+1, j-1 {
        runes[i], runes[j] = runes[j], runes[i]
    }
    return string(runes)
}

Keywords and builtins used here

for
func
len
return
rune
string

The run, in numbers

Lines: 7
Characters to type: 169
Tokens: 72
Three-star pace: 95 tpm

At the three-star pace of 95 tokens a minute, this run takes about 45 seconds.

Type this snippet

Step 5 of 5 in Strings & formatting, step 29 of 30 in Language basics.

← Previous Next →

Reverse a string in other languages

Rust