Check if a number ends in 00 or not

Question

I want to increase my minutes var everytime the seconds var reaches '00' in javascript.

So for instance Don't increase it when it is 82,761,912 But when it is 82,762,000

How can I check for this? I tried:

if(Math.floor(seconds) == seconds)

and

If(seconds % 1 != 0)

But neither of them produced the correct results.

You do realize that there are not 100 seconds in a minute, right? — Robby Cornelissen, Aug 23 '19 at 09:54
@RobbyCornelissen Yes I do, but i temporarily forgot! So I guess I could just `seconds % 60` instead? — Chud37, Aug 23 '19 at 10:20

score 1 · Answer 1 · answered Aug 23 '19 at 09:50

You can simply use test

  /0{2}$/

0{2} - Match 0 two time
$ - End of string

let testZeros = (str) => /0{2}$/.test(str)

console.log(testZeros(12345))
console.log(testZeros(123450))
console.log(testZeros(1234500))

Or you can do

let testZeros = (num) => num % 100 === 0

console.log(testZeros(12345))
console.log(testZeros(123450))
console.log(testZeros(1234500))

We have endsWith also

let testZeros = (str) => (str +'').endsWith('00')

console.log(testZeros(12345))
console.log(testZeros(123450))
console.log(testZeros(1234500))

Robby Cornelissen · Answer 2 · 2019-08-23T10:35:20.360

0

From what you describe, you're looking for a modulo 100 operation, but since you're dealing with seconds and minutes, you actually need a modulo 60 operation:

const test = (seconds) => !(seconds % 60);

console.log(test(82761912)); // false
console.log(test(82762020)); // true

edited Aug 23 '19 at 10:35

answered Aug 23 '19 at 09:51

Robby Cornelissen

91,784
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score 0 · Answer 3 · answered Aug 23 '19 at 09:51

0

Your second option should work with some tweaking. Say,


    if(seconds % 100 == 0){
    //increment minutes here
    }

answered Aug 23 '19 at 09:51

Etin

365
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score 0 · Answer 4 · answered Aug 23 '19 at 09:52

0

You can try this

if(seconds % 100 == 0)
 alert("end with 00");
else
 alert("Not end with 00");

answered Aug 23 '19 at 09:52

Praveen

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Check if a number ends in 00 or not

4 Answers4