I need a utility function that takes in an integer value (ranging from 2 to 5 digits in length) that rounds up to the next multiple of 5 instead of the nearest multiple of 5. Here is what I got:
function round5(x)
{
return (x % 5) >= 2.5 ? parseInt(x / 5) * 5 + 5 : parseInt(x / 5) * 5;
}
When I run round5(32), it gives me 30, where I want 35.
When I run round5(37), it gives me 35, where I want 40.
When I run round5(132), it gives me 130, where I want 135.
When I run round5(137), it gives me 135, where I want 140.
etc…
How do I do this?
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Answer
This will do the work:
function round5(x)
{
return Math.ceil(x/5)*5;
}
It’s just a variation of the common rounding number to nearest multiple of x function Math.round(number/x)*x, but using .ceil instead of .round makes it always round up instead of down/up according to mathematical rules.