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goto 語句將控制轉移到具有相同函式內相應標籤的語句。執行 goto 語句不得導致任何變數進入範圍,這些變數尚未在 goto 的範圍內。

例如,請參閱標準庫原始碼: https//golang.org/src/math/gamma.go

    for x < 0 {
        if x > -1e-09 {
            goto small
        }
        z = z / x
        x = x + 1
    }
    for x < 2 {
        if x < 1e-09 {
            goto small
        }
        z = z / x
        x = x + 1
    }

    if x == 2 {
        return z
    }

    x = x - 2
    p = (((((x*_gamP[0]+_gamP[1])*x+_gamP[2])*x+_gamP[3])*x+_gamP[4])*x+_gamP[5])*x + _gamP[6]
    q = ((((((x*_gamQ[0]+_gamQ[1])*x+_gamQ[2])*x+_gamQ[3])*x+_gamQ[4])*x+_gamQ[5])*x+_gamQ[6])*x + _gamQ[7]
    return z * p / q

small:
    if x == 0 {
        return Inf(1)
    }
    return z / ((1 + Euler*x) * x)