This question already has answers here:
What does % do in JavaScript?
(10 answers)
Closed 9 years ago.
How can I use modulo operator (%) in calculation of numbers for JavaScript projects?
It's the remainder operator and is used to get the remainder after integer division. Lots of languages have it. For example:
10 % 3 // = 1 ; because 3 * 3 gets you 9, and 10 - 9 is 1.
Apparently it is not the same as the modulo operator entirely.
That would be the modulo operator, which produces the remainder of the division of two numbers.
Related
This question already has answers here:
What does the "|" (single pipe) do in JavaScript?
(5 answers)
Closed 4 years ago.
I'm wondering how JavaScript evaluates the following expression:
10.333333 | 0 === 10
Is it because of bitwise ORing ignores the decimal part?
JavaScript bitwise operators all work by converting their operands to 32-bit integers. The operation is performed and the result is converted back to a (floating point) number.
This question already has answers here:
Is floating point math broken?
(31 answers)
Closed 7 years ago.
I have a JavaScript function that returns the result of multiplications using decimal values (four digits after dot).
But, in some conditions, the result is a mess like this:
3.9050 * 9 = 35.144999999999996.
What should I do to normalize those results?
Use .toFixed(numberOfDecsYouWant)
var num = 3.9050 * 9;
console.log(num); //35.144999999999996
console.log(num.toFixed(4)) //35.1450
This question already has answers here:
What does % do in JavaScript?
(10 answers)
Closed 7 years ago.
When I was repairing a Project via Java that I did about a year ago I came across a piece of Code using n%7 and its a mystery to me what it does. What I understand what it exactly means - Not referring to %.
Thanks in advance,
DR
It is called modulus. It can be read as n modulus 7.
The MODULUS Operator %
The modulus operator finds the modulus of its first operand with respect to the second. That is, it produces the remainder of dividing the first value by the second value. For example:
22 % 6 = 4 because 22 / 6 = 3 with a remainder of 4
read more here: http://mathbits.com/MathBits/Java/DataBasics/Mathoperators.htm
This question already has answers here:
Round a float up to the next integer in javascript
(4 answers)
Closed 7 years ago.
<script>
Math.round(2.1);
</script>
i need round off like this
Actual Result.
2.1 round is 2
2.6 round is 3
Expect Result
2.1 round is 3
2.6 round is 3
You seem to want to round up, which is done using Math.ceil:
Math.ceil(2.1)
gives
3
You can Use ceil:
Math.ceil(2.1); // 3
Math.ceil(.95); // 1
Math.ceil(4); // 4
Math.ceil(7.004); // 8
The Math.ceil() function returns the smallest integer greater than or equal to a given number.
Docs: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/ceil
You need to use Math.ceil()
Ceil rounds up!
var value = Math.ceil(old_value);
This question already has answers here:
What do these JavaScript bitwise operators do?
(3 answers)
Closed 8 years ago.
I've seen the following:
((2 * 45) + (2 * 124) + 100) >>> 3
Putting this in a console on its own reveals the value 54.
What is the purpose of >>> 3?
This is the Zero-fill right shift bitwise operator.
From the Mozilla Developer Network docs:
This operator shifts the first operand the specified number of bits to the right. Excess bits shifted off to the right are discarded. Zero bits are shifted in from the left. The sign bit becomes 0, so the result is always non-negative.