Switch statement in Go - Mini Project: Build & Apply

Using Switch Statement in Go

📖 Scenario: You are creating a simple program that tells the type of day based on a number input. This is like checking the day of the week where 1 means Monday, 2 means Tuesday, and so on.

🎯 Goal: Build a Go program that uses a switch statement to print the name of the day for numbers 1 to 7. If the number is not between 1 and 7, print "Invalid day".

📋 What You'll Learn

Create a variable dayNumber with an integer value.

Create a switch statement using dayNumber.

Use case blocks for numbers 1 to 7 to print the correct day name.

Use default case to print "Invalid day" for other numbers.

💡 Why This Matters

🌍 Real World

Switch statements are used in many programs to choose actions based on different values, like menu selections or day names.

💼 Career

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

1

Create the dayNumber variable

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

Go

// Create an integer variable called dayNumber and set it to 3
// Your code here

Need a hint?

Use := to declare and assign the variable in one line.

2

Start the switch statement

Add a switch statement using the variable dayNumber inside the main function.

Go

package main

func main() {
    dayNumber := 3
    // Start a switch statement with dayNumber
    // Your code here
}

Need a hint?

Write switch dayNumber { to start the switch block.

3

Add cases for days 1 to 7 and default

Inside the switch dayNumber, add case blocks for numbers 1 to 7. Use fmt.Println to print the day names: 1 - Monday, 2 - Tuesday, 3 - Wednesday, 4 - Thursday, 5 - Friday, 6 - Saturday, 7 - Sunday. Add a default case to print "Invalid day".

Go

package main

import "fmt"

func main() {
    dayNumber := 3
    switch dayNumber {
        // Add case 1 to 7 with fmt.Println for day names
        // Add default case to print "Invalid day"
        // Your code here
    }
}

Need a hint?

Each case ends with a colon and the code to run is indented below it.

4

Print the result

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

Go

package main

import "fmt"

func main() {
    dayNumber := 3
    switch dayNumber {
    case 1:
        fmt.Println("Monday")
    case 2:
        fmt.Println("Tuesday")
    case 3:
        fmt.Println("Wednesday")
    case 4:
        fmt.Println("Thursday")
    case 5:
        fmt.Println("Friday")
    case 6:
        fmt.Println("Saturday")
    case 7:
        fmt.Println("Sunday")
    default:
        fmt.Println("Invalid day")
    }
    // Run the program to print the day name
    // Your code here
}

Need a hint?

Just run the program. It will print the day name automatically.