Switch statement - Mini Project: Build & Apply

Using a Switch Statement in C

📖 Scenario: You are creating a simple program that tells the name of a day based on a number input from 1 to 7.

🎯 Goal: Build a C program that uses a switch statement to print the correct day name for a given number.

📋 What You'll Learn

Create an integer variable called dayNumber with the value 3

Create an integer variable called invalidDay with the value 0

Use a switch statement on dayNumber with cases for numbers 1 to 7

Print the correct day name for each case

Use default case to print "Invalid day" if the number is not 1 to 7

Print the result using printf

💡 Why This Matters

🌍 Real World

Switch statements are used in many programs to choose actions based on a value, like menu selections or commands.

💼 Career

Understanding switch statements helps in writing clear and efficient code for decision-making in software development.

1

Create the day number variable

Create an integer variable called dayNumber and set it to 3.

C

# Your code here

Need a hint?

Use int dayNumber = 3; to create the variable.

2

Create the invalid day variable

Create an integer variable called invalidDay and set it to 0.

C

int dayNumber = 3;
# Your code here

Need a hint?

Use int invalidDay = 0; to create the variable.

3

Write the switch statement for day names

Write a switch statement using dayNumber with cases 1 to 7. For each case, use printf to print the day name: 1 for "Monday", 2 for "Tuesday", 3 for "Wednesday", 4 for "Thursday", 5 for "Friday", 6 for "Saturday", 7 for "Sunday". Add a default case that prints "Invalid day".

C

int dayNumber = 3;
int invalidDay = 0;

# Your code here

Need a hint?

Use switch(dayNumber) { ... } with case labels and break; after each printf.

4

Print the day name result

Run the program to print the day name for dayNumber. The output should be Wednesday.

C

int dayNumber = 3;
int invalidDay = 0;

switch(dayNumber) {
    case 1:
        printf("Monday\n");
        break;
    case 2:
        printf("Tuesday\n");
        break;
    case 3:
        printf("Wednesday\n");
        break;
    case 4:
        printf("Thursday\n");
        break;
    case 5:
        printf("Friday\n");
        break;
    case 6:
        printf("Saturday\n");
        break;
    case 7:
        printf("Sunday\n");
        break;
    default:
        printf("Invalid day\n");
}

# No extra code needed, just run the program

Need a hint?

Compile and run the program. It should print Wednesday.