Control flow statements like Python if-elif-else can be used to make decisions in Python on the basis of a Boolean Condition.
Decision Statement: When the Boolean Condition following if keyword is True, the program control will flow to the enclosed block of code, else skip over it.
if condition:
statements
elif condition:
statements:
...
else:
statements
Note: else is not mandatory with if or after elif.
and, or can be used to join condition whereas not can be used to negate the condition.
Example:
if condition1 and condition2:
...
if condition1 or condition2:
...
if not i%2==0:
...
if var: # !=None
...
if "hello".isupper():
...