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JavaScript JavaScript Basics Storing and Tracking Information with Variables Update the Value of a Variable

I don't know why I need to switch const to var..those two have different name for tag.

const points = 100; const bonusPts = 50;

points += bonusPts; console.log(points);

app.js
const points = 100;
const bonusPts = 50;

points += bonusPts;
console.log(points);

3 Answers

The const variable is for not changing things, it is constant, and var is for variables, things that change.

thank you for your comment. I just got what const variable is! I will remember it is not for chaning things!

Mark Sebeck
MOD
Mark Sebeck
Treehouse Moderator 38,304 Points

The value of a 'const' can not be changed. So in your example bonusPts could be a 'const' but since you are changing the value of points it can not be a 'const'. BTW the new standard in JavaScript is to use 'let' instead of 'var'. Hope this clears up the confusion.

yesterday when I read your comment, I didn't get it......but today morning I just got 'ah' moment! Now I remember that 'const' is not for sport scoring system as you said ' the value of const can not be changed. thank you!

Is anybody on to help me figure out how the this is supposed to look?

Mark Sebeck
Mark Sebeck
Treehouse Moderator 38,304 Points

You just need to chance the const to a var or let. Constants can't change just variables. let is the new javascript standard for variables but var still works.