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Go

Learn concurrent programming with Go.

1

Hello World

Go uses fmt.Println() for output. Every file starts with a package declaration.

Example

Run this example to see how it works and then try the exercise.

example.go
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Output
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Exercise

Your task: Print "Hello, World!" using fmt.Println()

main.go
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Output
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Quiz

What must every Go source file start with?

SUMMARY

In this section, you learned how to print output to the console. Next, you’ll learn how to declare variables.

2

Variables

Go offers two ways to declare variables: var for explicit typing and := for short declaration.

Example

Run this example to see how it works and then try the exercise.

example.go
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Output
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Exercise

Your task: Declare variables name and age using :=

main.go
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Output
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Quiz

What is the short variable declaration operator in Go?

SUMMARY

In this section, you learned how to declare variables. Next, you’ll learn how to perform mathematical operations.

3

Arithmetic Operations

Go supports all standard arithmetic operations. Integer division truncates the decimal part.

Example

Run this example to see how it works and then try the exercise.

example.go
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Output
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Exercise

Your task: Calculate area and print "Area: {area}"

main.go
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Output
Click "Run" to execute your code...
Quiz

What is the result of 17 / 5 in Go (both are int)?

SUMMARY

In this section, you learned how to perform mathematical operations. Next, you’ll learn how to manipulate and work with strings.

Unlock 10 More Lessons

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Locked lessons:
  • String Operations
  • Functions
  • Conditionals
  • Switch Statements
  • Arrays and Slices
  • Maps
  • Structs
  • Methods
  • Final Project: Student Grade System
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