Function parameters in Go - Mini Project: Build & Apply

Function parameters

📖 Scenario: You are creating a simple calculator program in Go. The calculator will add two numbers provided by the user.

🎯 Goal: Build a Go program that defines a function with parameters to add two numbers and then prints the result.

📋 What You'll Learn

Create a function named add that takes two int parameters named a and b.

The add function should return the sum of a and b.

Call the add function with two integer arguments.

Print the result of the add function call.

💡 Why This Matters

🌍 Real World

Functions with parameters let you reuse code for different inputs, like calculators or data processors.

💼 Career

Understanding function parameters is essential for writing clean, reusable code in any software development job.

1

Create the main function

Write the main function with an empty body.

Go

func main() {
    // Your code here
}

Hint

The main function is the starting point of a Go program.

2

Define the add function with parameters

Define a function named add that takes two int parameters named a and b, and returns an int.

Go

package main

func main() {
    
}

// Define the add function here
// Your code here

Hint

Use func add(a int, b int) int to define the function with parameters and return type.

3

Call the add function with arguments

Inside the main function, call the add function with arguments 5 and 3, and store the result in a variable named sum.

Go

package main

func main() {
    // Call add with 5 and 3 and store in sum
    // Your code here
}

func add(a int, b int) int {
    return a + b
}

Hint

Use sum := add(5, 3) to call the function and save the result.

4

Print the result

Add a fmt.Println statement inside main to print the value of sum. Remember to import the fmt package.

Go

package main

import "fmt"

func main() {
    sum := add(5, 3)
    // Print sum here
    // Your code here
}

func add(a int, b int) int {
    return a + b
}

Hint

Use fmt.Println(sum) to print the sum. Don't forget to import fmt.