How to set 7-digit precision after the floating point

Question

Example that calculates area of trapezoid

Input 5, 7, 12, Output 72.0000000
Input 8.5, 4.3, 2.7, Output 49.5000000
Input 100, 200, 300,    Output 45000.0000000
Input 5, 7, 12, Output 72.0000000
Input 0.222, 0.333, 0.555,  Output 0.1540125

I need the answer to look like the above always to have 7 digits behind it.

I don't understand the relation between your inputs and outputs. — Soner Gönül, Mar 27 '16 at 15:01
There are TONS of duplicates around here. Please search as a first step. — Soner Gönül, Mar 27 '16 at 15:04

score 0 · Answer 1 · answered Mar 27 '16 at 15:01

0

string.Format("{0:0.0000000}", 34.5223423523542);
//  34.5223424

string.Format("{0:N7}", 34.5223423523542);
//  34.5223424

answered Mar 27 '16 at 15:01

Nick Larsen

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user1666620 · Accepted Answer · 2016-03-27T15:07:12.980

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If you are going to be displaying only a certain number of digits, you may want to round the result prior to display it.

double number = 1.23456789;
string output = Math.Round(number, 7, MidpointRounding.AwayFromZero).ToString("N7")

The value of output above will be 1.2345679.

edited Mar 27 '16 at 15:07

answered Mar 27 '16 at 15:01

user1666620

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This is what i was looking for, because i don't know the number that is going to be calculated and i can't use String.Format. Thanks man – Kaloyan Stefanov Mar 27 '16 at 15:30
@AnakinSkywalker ok, mark as answer if that's the case then. – user1666620 Mar 27 '16 at 15:51

How to set 7-digit precision after the floating point

2 Answers2