"""Absolute Value."""


def abs_val(num):
 """
 Find the absolute value of a number.

 >>> abs_val(-5.1)
 5.1
 >>> abs_val(-5) == abs_val(5)
 True
 >>> abs_val(0)
 0
 """
 return -num if num < 0 else num


def test_abs_val():
 """
 >>> test_abs_val()
 """
 assert 0 == abs_val(0)
 assert 34 == abs_val(34)
 assert 100000000000 == abs_val(-100000000000)


if __name__ == "__main__":
 print(abs_val(-34)) # --> 34