Reverse Integer

Given a 32-bit signed integer, reverse digits of an integer.

Example 1:

Input: 123

Output: 321

Example 2:

Input: -123

Output: -321

Example 3:

Input: 120

Output: 21

Note:

Assume we are dealing with an environment which could only store integers within the 32-bit signed integer range: [−231, 231 − 1]. For the purpose of this problem, assume that your function returns 0 when the reversed integer overflows.

Reverse Integer

import(

"fmt"

)

func reverse(x int) int {

var IsNeg bool = false

var Resp int = 0

var Power int = int(math.Pow(2, 31))

if x < 0 {

IsNeg = true

x = -1 * x;

}

for x > 0 {

var Curr int = x%10

Resp = Resp * 10 + Curr

x = x/10;

}

if IsNeg {

Resp = -1 * Resp

}

if Resp > Power-1 || Resp < -1 * Power {

return 0

}

return Resp

}

Reverse Integer

class Solution:

def reverse(self, x):

"""

:type x: int

:rtype: int

"""

isNeg = False

resp = 0

power = 2**31

if x < 0:

isNeg = True

x = -1*x

while x > 0:

mod = x%10

resp = resp*10 + mod

x = int(x/10)

if isNeg:

resp = -1*resp

if resp > power-1 or resp < -1*power:

return 0

return resp