abs

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    """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