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JavaScript JavaScript Basics (Retired) Working With Numbers Doing Math

Posted by Kate Anisha
Kate Anisha
4,671 Points

Updating a variable

Could someone please explain to me why at 2:00 why is it score = score + 100; instead of score = 100; ?

Thanks

3 Answers

martinjones1
.a{fill-rule:evenodd;}techdegree seal-36
martinjones1
Front End Web Development Techdegree Graduate 44,824 Points

If you set the score as equal to 100, it will always be 100.

What would happen when you want to add another 100 to a score of 100?

The "score" variable is used to keep track of the score and is updated when something happens.

So if the current score is 1000, the next score will be 1000 (score) + 100, giving you 1100

Kate Anisha
Kate Anisha
4,671 Points
Kate Anisha
Kate Anisha
4,671 Points

So if I just went Var Score = 100

Then

Var Score = 200 it would just change the value to 200 instead of adding the two together ?

Can I achieve a score of 300 by going Var score = 100

score += 200

Thanks

martinjones1
.a{fill-rule:evenodd;}techdegree seal-36
martinjones1
Front End Web Development Techdegree Graduate 44,824 Points

Yes that is exactly correct :D

Kate Anisha
Kate Anisha
4,671 Points
Kate Anisha
Kate Anisha
4,671 Points

Awesome, thank you!