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li = [1,2,'a','b']
if 'hello' not in li:
print('hello is not in the list')
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# Using "if not" is practically saying that, 'if this condition is false......'
a = False
if not a:
print("a is False")
# IS SAME AS:
if a == False:
print("a is False")
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arr = ['a','b','c','d','e','f']
if 'g' not in arr:
print('g is not in the list')
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today = 'Sunday'
if not today=='Sunday':
print('Go to work.')
else:
print('Take rest.')
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boolean = False
if not boolean: #Boolean is false.
print("No")
else: #Boolean is True
print("Yes")