a = False<br /> if not a:<br /> yourFunction()

# Using “if not” is practically saying that, ‘if this condition is false……’<br /> a = False<br /> if not a:<br /> print(“a is False”)</p> <p># IS SAME AS:</p> <p>if a == False:<br /> print(“a is False”)

li = [1,2,’a’,’b’]<br /> if ‘hello’ not in li:<br /> print(‘hello is not in the list’)

today = ‘Sunday’</p> <p>if not today==’Sunday’:<br /> print(‘Go to work.’)<br /> else:<br /> print(‘Take rest.’)

boolean = False</p> <p>if not boolean: #Boolean is false.<br /> print(“No”)<br /> else: #Boolean is True<br /> print(“Yes”)

result is not None