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Switch Statement is also known as the conditional statement in the C Programming language. Instead of using multiple if else conditions or nested if else we can go with a switch statement.

Syntax of Switch in C

switch(expression) {
  case x:
    // code block to execute
    break;
  case y:
    // code block to execute
    break;
  default:
    // code block to execute
}

switch statement rules C language

• switch expression can be an integer or a character.
• Expression is evaluated only once and then it will be compared with the cases.
• If the case matched the expression result, that code block will be executed.
• default block is optional and it is executed if there is no case match.
• break keyword breaks the switch block and comes out from the switch block.

break Keyword

• When execution reaches to break keyword, it breaks out of the switch block.
• It stops the execution of the current block.
• It is used in the switch statements to break the next case check if a match is found. This means if the case matches the expression result, then no need to check the next case as already work is done.

C Program to demonstrate Switch Expression

#include<stdio.h>
int main() {
  int number = 20;
  switch (number) {
  case 10:
    printf("Matched with case 10");
    break;
  case 20:
    printf("Matched with case 20");
    break;
  case 30:
    printf("Matched with case 30");
    break;
  default:
    printf("No match found");
  }
  return 0;
}

Output

Matched with case 20