C++ nested if statements

It is always legal to nest if-else statements, which means you can use one if or else if statement inside another if or else if statement(s).

Syntax

The syntax for a nested if statement is as follows −

if( boolean_expression 1){// Executes when the boolean expression 1 is trueif(boolean_expression 2){// Executes when the boolean expression 2 is true}}

You can nest else if…else in the similar way as you have nested if statement.

Example

#include <iostream>usingnamespace std;intmain(){// local variable declaration:int a =100;int b =200;// check the boolean conditionif( a ==100){// if condition is true then check the followingif( b ==200){// if condition is true then print the following
         cout <<"Value of a is 100 and b is 200"<< endl;}}
   cout <<"Exact value of a is : "<< a << endl;
   cout <<"Exact value of b is : "<< b << endl;return0;}

When the above code is compiled and executed, it produces the following result −

Value of a is 100 and b is 200
Exact value of a is : 100
Exact value of b is : 200