JS-012
Visual JavaScript guide to Reassignment: Learn how to replace the value stored in a variable
Beginner2 min~2 min read#variables#assignment#reassignment

Reassignment

Replace the value

Goal

Learn how to replace the value stored in a variable.

Explanation

  • Reassignment means replacing an old value with a new one.
  • The variable stays the same, but its contents change.
  • The = operator is used for this.
  • Only variables created with let can be reassigned.
  • After reassignment, the old value is no longer stored in that variable.

Analogy

At first there was an apple in the box. You took it out and put in a pizza. The box stayed the same — only its contents changed.

Code

let food = "Apple";

food = "Pizza";

console.log(food);

Result: Pizza

Common mistake

Beginners sometimes think they are creating a new variable. In fact, they are only changing the value of an existing one.

Remember

  • ✦ Reassignment changes the value.
  • ✦ The variable stays the same.
  • ✦ Reassignment works with let.

Quick Quiz

What changes during reassignment?

Resources