# Syntax

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

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 <stdio.h>

int main ()
{
/* local variable definition */
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 */
printf("Value of a is 100 and b is 200\n" );
}
}
printf("Exact value of a is : %d\n", a );
printf("Exact value of b is : %d\n", b );

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