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@@ -0,0 +1,42 @@
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+package main
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+
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+import "fmt"
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+
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+func main() {
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+ var num int
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+
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+ num = 123
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+ fmt.Println(reverse(num))
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+
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+ num = -123
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+ fmt.Println(reverse(num))
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+
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+ num = 120
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+ fmt.Println(reverse(num))
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+
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+ num = 1534236469
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+ fmt.Println(reverse(num))
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+}
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+
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+func reverse(x int) int {
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+ var digit = x
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+ if x < 0 {
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+ digit = -x
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+ }
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+ var ans int
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+ for {
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+ if digit/10 == 0 && digit%10 == 0 {
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+ break
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+ }
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+ ans = ans*10 + digit%10
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+ digit /= 10
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+ }
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+
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+ if x < 0 {
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+ ans = -ans
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+ }
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+ if ans > 2147483647 || ans < -2147483648 {
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+ return 0
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+ }
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+ return ans
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+}
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