Switch Statement:

A switch statement in C is a control flow statement that allows a program to perform different actions based on the value of an expression. It provides an alternative way to handle multiple conditions more efficiently than a series of nested if-else statements. In Short, The Control statement which allows us to make a decision from the number of choices is called a switch or switch-case-default. 

Flow-Chart:

Syntax: 

switch (expression) {
case constant1:
// Code to be executed if expression matches constant1
break;
case constant2:
// Code to be executed if expression matches constant2
break;
// Additional cases as needed
default:
// Code to be executed if none of the cases match
}

Here’s how the switch statement works:

• The switch keyword is followed by an expression (often a variable or a value).
• The expression is evaluated, and its value is compared to each case constant.
• If a match is found, the code associated with that case is executed.
• The break statement is used to exit the switch block. If a break is not present, control will “fall through” to subsequent cases, executing their code as well.
• The default case is optional and provides a default action if none of the cases match.

Example: Program To generate a Calculator using Switch Statement

#include <stdio.h>

int main()
{
    char operator;
    double num1, num2, result;

    // Input from the user
    printf(“Enter operator (+, -, *, /): “);
    scanf(” %c”, &operator); // Note the space before %c to consume any newline character left in the input buffer
    printf(“Enter two numbers: “);
    scanf(“%lf %lf”, &num1, &num2);

    // Switch statement to perform the calculation based on the operator
    switch (operator)
    {
    case ‘+’:
        result = num1 + num2;
        printf(“Result: %.2fn”, result);
        break;
    case ‘-‘:
        result = num1 – num2;
        printf(“Result: %.2fn”, result);
        break;
    case ‘*’:
        result = num1 * num2;
        printf(“Result: %.2fn”, result);
        break;
    case ‘/’:
        if (num2 != 0)
        {
            result = num1 / num2;
            printf(“Result: %.2fn”, result);
        }
        else
        {
            printf(“Error: Division by zero is not allowed.n”);
        }
        break;
    default:
        printf(“Error: Invalid operator.n”);
    }

    return 0;
}

Output:

Enter operator (+, -, *, /): *
Enter two numbers: 4
6
Result: 24.00