ch.bind.philib.math

Class RangeSum

java.lang.Object

ch.bind.philib.math.RangeSum

public final class RangeSum
extends Object

TODO

Author:

Philipp Meinen

Method Summary

Methods

Modifier and Type	Method and Description
static long	sumOfRange(long end) Calculate the sum of all values from 1 to end, including.
static long	sumOfRange(long start, long end) Calculates the sum of all values from start to end, including.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

sumOfRange

public static long sumOfRange(long end)

Calculate the sum of all values from 1 to end, including. That is: sum = 1 + 2 + 3 + ... + (end-1) + end
Examples:
f(0) = 0
f(1) = 1
f(2) = 3
f(3) = 6
f(10) = 55
f(100) = 5050


Parameters:

end - The end value of the sum-range.

Returns:

The sum of all values from 1 to end, including.

sumOfRange

public static long sumOfRange(long start,
              long end)

Calculates the sum of all values from start to end, including.

Parameters:

start - The start value of the sum-range.

end - The end value of the sum-range.

Returns:

The sum of all values from start to end , including.