Division in C# to get exact value

Question

If I divide 150 by 100, I should get 1.5. But I am getting 1.0 when I divided like I did below:

double result = 150 / 100;

Can anyone tell me how to get 1.5?

look up integer division - `100` is an integer - use doubles instead — BrokenGlass, Mar 14 '13 at 03:56

score 17 · Answer 1 · answered Mar 14 '13 at 03:59

try:

 double result = (double)150/100;

When you are performing the division as before:

double result = 150/100;

The devision is first done as an Int and then it gets cast as a double hence you get 1.0, you need to have a double in the equation for it to divide as a double.

score 10 · Answer 2 · answered Mar 14 '13 at 03:57

10

Cast one of the ints to a floating point type. You should look into the difference between decimal and double and decide which you want, but to use double:

double result = (double)150 / 100;

answered Mar 14 '13 at 03:57

MattW

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score 5 · Answer 3 · edited Jan 13 '17 at 09:48

5

Make the number float

var result = 150/100f

or you can make any of number to float by adding .0:

double result=150.0/100

or

double result=150/100.0

edited Jan 13 '17 at 09:48

Rob Lyndon

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answered Mar 14 '13 at 03:58

Mayank

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Note that adding the `.0` technically makes it a double which won't fit in a `float` (your code shows that but the text contradicts it). – Basic Sep 28 '19 at 20:17

score 4 · Answer 4 · answered Mar 14 '13 at 03:56

4

double result = (150.0/100.0)

One or both numbers should be a float/double on the right hand side of =

answered Mar 14 '13 at 03:56

Aniket Inge

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score 2 · Answer 5 · answered Mar 14 '13 at 03:59

If you're just using literal values like 150 and 100, C# is going to treat them as integers, and integer math always "rounds down". You can add a flag like "f" for float or "m" for decimal to not get integer math. So for example result = 150m/100m will give you a different answer than result = 150/100.

Division in C# to get exact value

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