Three ways to find the absolute value of python

import math


# Method 1, Keywords: Conditional judgment
def abs_value1():
    a = int(input('please enter a number:'))
    if a > 0:
        print(a)
    else:
        print(-a)


# Method 2, Keywords: Built-in function
def abs_value2():
    a = int(input('please input-number:'))
    b = abs(a)
    print(b)


# Method 3, Keywords: Built-in module
def abs_value3():
    a = int(input('Please enter a number:'))
    b = math.fabs(a)
    print(b)