program if_else {
  integer i = 100;
  integer j = 10;
  // simple if with only one statement to execute
  if (i == 100)
    printf("value of i is 100\n");
  else
    printf("value of i is not 100\n");

  // if with muliple statements
  if (i > 60) {
    printf ("I is greater then 60\n");
    printf ("I value is %0d\n",i);
  } else {
    printf ("I is less then 60\n");
    printf ("I value is %0d\n",i);
  }
  // nested if 
  if (i > 100) {
    printf ("I is greater then 100\n");
  } else if (j > 5) {
    printf ("J is greater then 5\n");
  } else {
    printf ("I is not greater then 100\n");
    printf ("J is not greater then 5\n");
  }

}