switch statement in c programming

                            switch statement

General form:
switch(expression)
{
case value-1:
block-1
break;
case value-2:
block-2
break;
........
........
default:
default-block
break;
}
statement-x;

1.
#include<stdio.h>
#incude<conio.h>
int main()
{
int a;
printf("Enter the value:");
scanf("%d",&a);
switch(a)
{
case '1':
printf("GOOD");
break;
case '2':
printf("VERY GOOD");
break;
case '3':
printf("VERY VERY GOOD");
break;
}
return 0;
}

Output:
Enter the value:3
VERY VERY GOOD


Other output:
Enter the value:1
GOOD

2.
#include<stdio.h>
#include<conio.h>
int main()
{
int a;
printf("Enter the value:");
scanf("%d",&a);
switch(a)
{
case '1':
case '2':
printf("GOOD");

break;

case '3':
printf("VERY GOOD");

break;
}
return 0;
}

Output:
Enter the value:1
GOOD
Other output:
Enter the value:2
GOOD
Other output:
Enter the value:3
VERY GOOD

Check vowel
3.
#include<stdio.h>
#include<conio.h>
int main()
{
  char ch;
clrscr();
  printf("Input a character\n");
  scanf("%c", &ch);

  switch(ch)
  {
  case 'a':
  case 'A':
  case 'e':
  case 'E':
  case 'i':
  case 'I':
  case 'o':
  case 'O':
  case 'u':
  case 'U':
  printf("%c is a vowel.\n", ch);
  break;
  /*if ch matches any case then it prints & breaks the execution */
  default:
  printf("%c is not a vowel.\n", ch);
 /*if the ch is not from the cases then prints ch is not a vowel */
  }
  return 0;
}

Output:

Input a character

e

e is a vowel.