What you'll learn in this Go loops tutorial

This interactive Go tutorial has 12 hands-on exercises. Estimated time: 18 minutes.

1. Your first loop — Think about a washing machine. You do not press "wash" 10 times for 10 items of clothing. You load everything, press sta…
2. The three parts of a for loop — A `for` loop has three parts separated by semicolons:
3. Use the counter inside the loop — `i` is just a variable. You can use it inside the loop body — multiply it, add to it, print it in a sentence.
4. Counting down — Loops do not have to count up. Change the step and direction and they count down.
5. while-style loop — Go has no `while` keyword. But a `for` loop without the start and step parts behaves exactly like a while loop — it runs…
6. Infinite loop with break — `for { }` with no condition runs forever. That sounds terrifying, but it is actually useful — when you do not know in ad…
7. continue — skip and keep going — `continue` skips the rest of the current iteration and jumps straight to the next one. The loop keeps running — just not…
8. Nested loops — a loop inside a loop — You can put a loop inside another loop. The inner loop runs completely for every single iteration of the outer loop.
9. Running total — One of the most common loop patterns: start a variable at zero, add to it inside the loop, read the result after.
10. range — cleaner counting — When you just want to count a fixed number of times, `range` is a cleaner option.
11. Fix the infinite loop — This program is supposed to print numbers until it reaches 10 — but it runs forever and never stops.
12. Build a countdown — No starter code.

Go Loops concepts covered

• Why write it 100 times when Go can do it for you