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 true if(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> using namespace std; int main () { // local variable declaration: int a = 100; int b = 200; // check the boolean condition if( a == 100 ) { // if condition is true then check the following if( 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; return 0; } 

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