Round DOWN to quarter (0.25)

Question

If I have a double, and want to round it down to the nearest quarter value (0.25), is this possible?

Each of these give me 0.5 and should actually give me 0.25:

Math.Round(0.499999, 2, MidpointRounding.AwayFromZero);
Math.Round(0.499999, 2, MidpointRounding.ToEven);

Is there any notion of always rounding "down"?

This question is related to "nearest" rounding. I don't need that

The "duplicate" is entirely based on NEAREST rounding. that is utterly irrelevant to me. I am not asking about NEAREST. I am asking about always rounding DOWN. Notice that 0.499999 is very NEAR to 0.5 - and that is not what I want. I want 0.49999 to become 0.25 (DOWN)

@stuartd the question is clear; "round _down_ to nearest quarter". — Alex McMillan, Nov 17 '18 at 00:12

abelenky · Accepted Answer · 2018-11-17T00:12:43.590

2

double x = 0.4999;
double answer = Math.Truncate(4*x)/4; // result: 0.25

edited Nov 17 '18 at 00:12

answered Nov 17 '18 at 00:03

abelenky

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Yeah, I was tired.... fixed now. – abelenky Nov 17 '18 at 00:13
This worked (with negatives too), thanks! – JacobIRR Nov 17 '18 at 00:17

Round DOWN to quarter (0.25)

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