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Working with math in javascript


Working with math in javascript

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Working with math in javascript
Tag : javascript , By : Viv
Date : November 25 2020, 07:06 PM


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JavaScript date math not working


Tag : javascript , By : clifton anderson
Date : March 29 2020, 07:55 AM
it should still fix some issue I have searched this forum and found many useful answers, but one of the answers that I used only works under certain conditions. , Here
secondday.setDate(firstday.getDate()+1)
secondday = new Date(firstday.getFullYear(), firstday.getMonth(), firstday.getDate()+1)

Javascript If / Else with simple math not working


Tag : javascript , By : mitry
Date : March 29 2020, 07:55 AM
it helps some times I have this script that gives me the time from the date I entered to the current time in days. , Seems to be some typography errors.
A corrected version is:
var millennium =new Date(2015, 6, 17);
var today=new Date();
var one_day=1000*60*60*24;
var x = Math.ceil((today.getTime()-millennium.getTime())/one_day)
if(x == 1) { 
    document.write(x + " day ago");
}
else {
   document.write(x + " days ago");
}

Javascript uint32 math not working?


Tag : javascript , By : Jet Thompson
Date : March 29 2020, 07:55 AM
I hope this helps you . That's because JS doesn't have an Integer type. So * does the multiplication in 64 bit floats. But these don't have enough precision for the result:
/* Exact math */ 1103515245 × 1103527590  =  1217759518843109550
/* JavaScript */ 1103515245 * 1103527590 === 1217759518843109600
                 Number.MAX_SAFE_INTEGER === 0009007199254740991
a[2] = Math.imul(a[0], a[1]); // -1770094418
a[2];                         //  2524872878

javascript math not working


Tag : javascript , By : desmiserables
Date : March 29 2020, 07:55 AM
hop of those help? Actually javascript produces decimal values of 1.333333 for 4/3 and it multiplied with 3 which tends to produce 4. 1 is the correct result for 4-((4/3)*3)+1 but if you want 2 as your result then you need to parse the value of 4/3 to int so 1.333333 will become 1 which is multiplied with 3 will produce 3.
 alert(4-(parseInt(4/3)*3)+1)

Math.exp not working as expected in Javascript


Tag : javascript , By : clifton anderson
Date : March 29 2020, 07:55 AM
may help you . ^ in javascript is the bitwise XOR operator, not an exponent.
You are looking for Math.pow or ** (ES7 - use the former for browsers):
Math.round(99 * Math.exp(-0.0065 * (28-variable) ** 2))
const fn = n =>
  Math.round(99 * Math.exp(-0.0065 * (28-n) ** 2))

console.log(fn(28))
console.log(fn(18))
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