It is perfectly all right if we write an entire if...else construct within either the body of the if statement or the body of an else statement. This is called ‘nesting’of ifs.
Nested if...else statements has ability to control program flow based on multiple levels of condition.
Syntax of Nested if...else Statement: Rules can be described for applying nested if...else statements Flow Diagram
if(condition)
{
// Statements inside body of if
}
else if(condition)
{
//Statements inside body of else if
}
else
{
//Statements inside body of else
}
Example:-
// Program to check whether an integer entered by the user is odd or even
#include <stdio.h>
int main()
{
int number;
printf("Enter an integer: ");
scanf("%d",&number);
// True if remainder is 0
if( number%2 == 0 )
printf("%d is an even integer.",number);
else
printf("%d is an odd integer.",number);
return 0;
}
Output:-
Enter an integer: 7
7 is an odd integer.