Division in double variable returning always zero

Question

I am trying to perform division and multiplication between two values and then save them in a double variable.

Multiplication is working fine but division always returning zero ?

Why is it so ?

Here is my Code :

double max_load =(Convert.ToDouble(ddl_gene_desc.SelectedValue)*0.8)*(80/100);

I checked it using the breakpoint that multiplication is fine but (80/100) returning 0.

Can any one please help me ?

Thanks in advance.

score 3 · Accepted Answer · answered Jun 14 '16 at 05:11

3

The result of 80/100 (both integers) is always 0.

Change it to 80.0/100.0

answered Jun 14 '16 at 05:11

Tibrogargan

4,508
3
19
38

thanks it worked :) – Alina Anjum Jun 14 '16 at 05:23

score 1 · Answer 2 · answered Jun 14 '16 at 05:12

1

You are dividing two integer values, in this case "80/100" will return 0 because both values are integers and integers do not store a result. Try "80.0/100" to force floating point division.

answered Jun 14 '16 at 05:12

Krikor Ailanjian

1,842
12
17

thanks for your answer, i'll give you a vote :) – – Alina Anjum Jun 14 '16 at 05:23

score 1 · Answer 3 · answered Jun 14 '16 at 05:13

1

80 is int, so is 100 - hence integer division. Append 'F' to one of them to make it a float. Or double..

answered Jun 14 '16 at 05:13

ABuckau

319
4
8

thanks for your answer, i'll give you a vote :) – Alina Anjum Jun 14 '16 at 05:23

Division in double variable returning always zero

3 Answers3

Linked