Indention: It is used to declare a block in Python if two statements are at the same level, then they are at the part of the same block.
If else:
If: It is used to test conditions, if the condition is true it executes the block of statement.
a=50
if a>40:
print(a)
if a>40 and a<60:
print(a)
else: it executes when the condition is false.
ex:
check whether a person is eligible to vote or not
Check whether a number is divisible by 2 or not
elif: It allows us to create multiple conditions, and execute specific blocks of statement depending upon the true condition.
ex: check the grade
Grade A: 90-100
Grade B: 80-90
Grade C: 70-80
Grade D: less than 70