/*if(boolean_expression 1) {
   Executes when the boolean expression 1 is true 
} else if( boolean_expression 2) {
    Executes when the boolean expression 2 is true 
} else if( boolean_expression 3) {
   Executes when the boolean expression 3 is true 
} else {
   executes when the none of the above condition is true 
}*/

#include <stdio.h>
 
int main () {

   /* local variable definition */
   int a = 100;
 
   /* check the boolean condition */
   if( a == 10 ) {
      /* if condition is true then print the following */
      printf("Value of a is 10
" );
   } else if( a == 20 ) {
      /* if else if condition is true */
      printf("Value of a is 20
" );
   } else if( a == 30 ) {
      /* if else if condition is true  */
      printf("Value of a is 30
" );
   } else {
      /* if none of the conditions is true */
      printf("None of the values is matching
" );
   }
   
   printf("Exact value of a is: %d
", a );
 
   return 0;
}

/*None of the values is matching
Exact value of a is: 100*/