Page 495 - ComputerScience_Class_11

The elif statement allows you to check additional conditions Start
when the first if condition is not satisfied. You can use multiple
elif statements, which means that the program can test several
different conditions before reaching the final else (if any).
if condition 1? true
Syntax:

if condition1 :
false Statement 1
first block
elif condition2: true
elif Condition 2?
second block
false Statement 2
………………
else: Statement 3

final block
Stop

Program 4: Write a program to check if a number is positive, negative or zero.

Program 4.py
File Edit Format Run Options Window Help

a=int(input('Enter any number: '))

if a>0:
print(a, 'is positive')
elif a==0:
print(a, 'is zero')
else:
print(a, 'is negative')

Output

Enter any number: 10
10 is positive

The Nested if Statement
The nested if statement in Python is a way of placing one if statement inside another. This allows you to check multiple
conditions in a hierarchical manner. It is useful when you need to make decisions based on the outcome of previous
conditions.

A nested if statement is used when you want to check a condition inside another condition. This makes your code
more flexible for complex decision-making scenarios. The basic structure of a nested if statement involves having an if
statement inside another if, elif or else block.

Flow of Control 493