Go uses fmt.Println() for output. Every file starts with a package declaration.
Go
Learn concurrent programming with Go.
1
Hello World
Example
Run this example to see how it works and then try the exercise.
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Output
Click "Run" to see the example in action...Exercise
Your task: Print "Hello, World!" using fmt.Println()
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Output
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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.
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Output
Click "Run" to see the example in action...Exercise
Your task: Declare variables name and age using :=
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Output
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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.
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Output
Click "Run" to see the example in action...Exercise
Your task: Calculate area and print "Area: {area}"
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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.
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Locked lessons:
- String Operations
- Functions
- Conditionals
- Switch Statements
- Arrays and Slices
- Maps
- Structs
- Structs
- Final Project: Student Grade System