I need some help how to make this math formula in javascript. i have tried searching but couldn't really find cause i dont even know what ^ is called in English.

Thanks in advance

Math.floor(20*(1.1^(x-10)));

I need some help how to make this math formula in javascript. i have tried searching but couldn't really find cause i dont even know what ^ is called in English.

Thanks in advance

Math.floor(20*(1.1^(x-10)));

• javascript
• math
• formula

Share Improve this question Follow edited Aug 1, 2015 at 6:42 user2864740 62.1k1515 gold badges158158 silver badges229229 bronze badges asked Jan 28, 2013 at 20:44 LilithLilith 6133 bronze badges 3

• 3 Here's the Math object documentation. – Pointy Commented Jan 28, 2013 at 20:45
• 5 a^b does not raise a to the b power in JavaScript. You'll want to use Math.pow. – zzzzBov Commented Jan 28, 2013 at 20:45
• In English, people generally say A^B as A to the Bth power. In your case, 1.1 to the (x minus 10)th power. See also Exponentiation: en.wikipedia/wiki/Exponentiation – DACrosby Commented Jan 28, 2013 at 20:51

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4 Answers 4

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Math.floor(20*(Math.pow(1.1, (x-10))));

^ is the bitwise XOR operator - not what you want. Use the Math.pow function for exponentiation:

Math.floor( 20 * (Math.pow(1.1, x - 10)) );

Set this up in a function so you can use x for whatever value it may be:

var eq = function(x) {
    return Math.floor( 20 * (Math.pow(1.1, x - 10)) );
};

Math.pow() is what you are looking for.

^, as used in other languages, is called the power or exponential operator, but in Javascript, it serves a different purpose, it is the bitwise XOR operator.

Math.floor(20*(Math.pow(1.1, x - 10)));