[Overview][Constants][Types][Classes][Procedures and functions][Index] Reference for unit 'math' (#rtl)

sum

Return sum of values

Declaration

Source position: math.pp line 384

 function sum( const data: array of Single ):Float;function sum( const data: PSingle; const N: LongInt ):Float;function sum( const data: array of Double ):Float;function sum( const data: PDouble; const N: LongInt ):Float;function sum( const data: array of Extended ):Float;function sum( const data: PExtended; const N: LongInt ):Float;

Description

Sum returns the sum of the values in the data array.

The second form of the function accepts a pointer to an array of N values.

Errors

None.

 sumofsquares Return sum of squares of values sumsandsquares Return sum and sum of squares of values. totalvariance Return total varians of values variance Return variance of values

Example

```Program Example44;

{ Program to demonstrate the Sum function. }

Uses math;

Var
I : 1..100;
ExArray : Array[1..100] of Float;

begin
Randomize;
for I:=low(ExArray) to high(ExArray) do
ExArray[i]:=(Random-Random)*100;
Writeln('Max     : ',MaxValue(ExArray):8:4);
Writeln('Min     : ',MinValue(ExArray):8:4);
Writeln('Sum     : ',Sum(ExArray):8:4);
Writeln('Sum (b) : ',Sum(@ExArray[1],100):8:4);
end.
```