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JavaScript JavaScript Basics (Retired) Making Decisions with Conditional Statements Build a Random Number Guessing Game

Posted by john larson
john larson
16,594 Points

(2*3) + 2 * 6

the js console says this is = 18: not being brilliant in math by my calculations this should be 48...or maybe 38 ... but in no scenario can I imagine it would be 18.

5 Answers

Jeff Lemay
Jeff Lemay
14,268 Points
Jeff Lemay
Jeff Lemay
14,268 Points

Order of Operations: Multiplication/Division then Add/Subtract

2*3 and 2*6 are run first regardless ( which then gives you (6) + 12 ). If you want it to get forty eight, you need:

(2 * 3 + 2) * 6

john larson
john larson
16,594 Points

thank you jeff,

Caleb Kleveter
MOD
Caleb Kleveter
Treehouse Moderator 37,862 Points
Caleb Kleveter
Caleb Kleveter
Treehouse Moderator 37,862 Points

The way it works is the PEMDAS, or parentheses, exponents, multiplication and division, then addition and subtraction.

john larson
john larson
16,594 Points
john larson
john larson
16,594 Points

thanks caleb, yes I can see that now

john larson
john larson
16,594 Points
john larson
john larson
16,594 Points

so (2*3) + (2 * 6) is the same as 2*3 + 2*6

john larson
john larson
16,594 Points
john larson
john larson
16,594 Points

Thanks again jeff.