Using range in switch case in C/C++

In C or C, we use switch-case statement. In switch statement we pass some value and using different cases we can check that value. Here we will see that we can use scopes in case statements.

The syntax for using range in Case is as follows -

case low … high

After writing the case, we have to enter the lower value, then a space, then three dots, and then another spaces, and finally the higher value.

In the following program, we will see what is the output of a range-based case statement.

Example

#include <stdio.h>
main() {
   int data[10] = { 5, 4, 10, 25, 60, 47, 23, 80, 14, 11};
   int i;
   for(i = 0; i < 10; i++) {
      switch (data[i]) {
         case 1 ... 10:
            printf("%d in range 1 to 10\n", data[i]);
         break;
         case 11 ... 20:
            printf("%d in range 11 to 20\n", data[i]);
         break;
         case 21 ... 30:
            printf("%d in range 21 to 30\n", data[i]);
         break;
         case 31 ... 40:
            printf("%d in range 31 to 40\n", data[i]);
         break;
         default:
            printf("%d Exceeds the range\n", data[i]);
         break;
      }
   }
}

Output

5 in range 1 to 10
4 in range 1 to 10
10 in range 1 to 10
25 in range 21 to 30
60 Exceeds the range
47 Exceeds the range
23 in range 21 to 30
80 Exceeds the range
14 in range 11 to 20
11 in range 11 to 20

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