- Array:
const names: string[] = ["Ali", "Sara"];orArray<string> readonly string[]cannot be changed.- A tuple is an array with a fixed length and a type for each position:
let point: [number, number] = [3, 4]; - Named tuples:
[x: number, y: number]
TypeScript Arrays & Tuples
Typed arrays, readonly arrays and tuples.
✍️ 3 exercises + code challenge in this lessonKey Takeaways: TypeScript Arrays & Tuples
Mastering TypeScript Arrays & Tuples helps you write clean and reliable TypeScript code. Follow standard conventions, test edge cases, and keep logic simple. Try running the code example below and complete the exercises to build confidence.
TypeScript Arrays & Tuples Code Example
TypeScriptconst scores: number[] = [72, 95, 88];
scores.push(64);
const user: [string, number] = ["Hina", 23];
const [name, age] = user;
console.log(scores.length, name, age);Output
4 Hina 23
Free sign-in required · Google login available
TypeScript Arrays & Tuples Practice Exercises
Check what you learned in “TypeScript Arrays & Tuples”.
/ 3 solved
Fill in the blank
Declare an array of numbers.
const marks: = [80, 90];
✓ Correct!
Not quite. Try again.
Multiple choice
What is a tuple?
✓ Correct!
Not quite. Try again.
Code challenge
Create a tuple pair: [string, number] = ["Ali", 25] and log both values separated by a space.
Write the code in the live editor. Your answer is checked automatically.
✓ Solved
Free sign-in required · Google login available
to save your exercise progress.
Finished this lesson?
Mark it complete to track your progress.
Stuck on something?
Ask the community in the CodesInTech forum.
Need a developer?
Learning on your own is great — and when you need professional help, our team builds custom software, websites and mobile apps for clients worldwide.
Explore Our Services