Nested if else statement:

if... else can be used in nested forms,when serious decisions are involved.

syntax:

if (condition) 

    statements to be executed if test expression is true;

 else if(condition) 

    statements to be executed if test expressions 1 is true;

 else if (condition) 

    . . . 

else

     statements to be executed if all test expressions are false;

program:

void  main()

{

  int a=40,b=20;

  if (a == b)

  {

      printf("a is equal to b");

  }

else if( a > b)

{

    printf("a is greater than  b");

}

else

{

printf("a is less than b");

}

}

output:

a is greater than  b