Difference Between C & Ruby

C Programming Language

      printf ("Input grade :");
      scanf("%d", & grade);

      switch (grade) {
                                 case 1: 
                                              printf("F\n");break;
                                 case 2: 
                                              printf("D\n");break;
                                 case 3: 
                                              printf("C\n");break;
                                 case 4: 
                                              printf("B\n");break;
                                 case 5: 
                                              printf("A\n");break;
                                 default:
                                              printf("Wrong grade choice\n");
                                              break;       
      }

RUBY Programming Language

#!/usr/bin/ruby

$age =  5
case $age
when 0 .. 2
    puts "baby"
when 3 .. 6
    puts "little child"
when 7 .. 12
    puts "child"
when 13 .. 18
    puts "youth"
else
    puts "adult"
end