Arithmetic Operations Using Switch Case in C

Arithmetic operations play a fundamental role in computer programming, enabling developers to perform calculations and manipulate numerical data efficiently. In the C programming language, one way to execute arithmetic operations is by utilizing switch-case statements, providing a structured and organized approach to handle different mathematical operations.

Switch Statement in C

The switch case statement in C enables programmers to control the program’s flow based on the value of an expression. It comprises a series of case labels, each associated with a specific code block. When the expression’s value matches a case label, the corresponding code block is executed.

The general syntax of the switch case statement is as follows:

switch (expression) {
    case value1:
        // Code block for value1
        break;

    case value2:
        // Code block for value2
        break;

    ...

    default:
        // Default code block
}

Arithmetic Operations Using Switch Case in C – Code

Let’s see how arithmetic operations can be implemented using switch-case statements in C –

#include <stdio.h>

void main() {
    char operation;
    double num1, num2, result;

    // Displaying the menu of arithmetic operations
    printf("Choose an arithmetic operation (+, -, *, /, %%): ");
    scanf("%c", &operation);

    // Input two numbers for the arithmetic operation
    printf("Enter two numbers: ");
    scanf("%lf %lf", &num1, &num2);

    // Switch-case statement to perform the selected arithmetic operation
    switch (operation) {
        case '+':
            result = num1 + num2;
            printf("Sum: %.2lf\n", result);
            break;

        case '-':
            result = num1 - num2;
            printf("Difference: %.2lf\n", result);
            break;

        case '*':
            result = num1 * num2;
            printf("Product: %.2lf\n", result);
            break;

        case '/':
            if (num2 != 0) {
                result = num1 / num2;
                printf("Quotient: %.2lf\n", result);
            } else {
                printf("Error! Division by zero is not allowed.\n");
            }
            break;

        case '%':
            if (num2 != 0) {
                result = (int)num1 % (int)num2;
                printf("Modulus: %.2lf\n", result);
            } else {
                printf("Error! Division by zero is not allowed.\n");
            }
            break;

        default:
            printf("Invalid operation selected.\n");
    }

}

This C program starts by prompting the user to select an arithmetic operation from the menu (+, -, *, /, %). Then, it reads two numbers from the user. Based on the selected operation, the switch-case statement performs the corresponding arithmetic calculation and displays the result.

Output -1

Output -2

See Also

• C Program to Find Area of Rectangle Using Function