Write a program that inverts an integer. (Ex: Input: 123, Output: 321)

Question

Anonimo · Accepted Answer

def invertInt(a):
        a = str(a)
        a = a[::-1]
        return(int(a))

Anonymous · Answer

You can do so with mathematical operations as well instead of string casting. 
def reverseInt(num):
    numDigits = int(math.log10(num)) + 1
    result = 0
    for i in range(numDigits,0,-1):
        left_digit = num%10
        result = result + left_digit*(10**(i-1))
        num = num//10
    return result

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