sum_interval
Returns the sum of consecutive integers between m and n (inclusive).
$$\sum _{i\mathop {=} m}^{n}a_{i}=a_{m}+a_{m+1}+a_{m+2}+\cdots +a_{n-1}+a_{n}$$
s = sum_interval(1, 5); // 1 + 2 + 3 + 4 + 5 == 15
s = sum_interval(50, 100); // 50 + 51 + ... + 100 == 3825
s = sum_interval(-5, 5); // (-5) + (-4) + ... + 4 + 5 == 0- sum_interval(m, n)
- Returns the sum of consecutive integers between m and n (inclusive).
COPY/// @func sum_interval(m, n)
///
/// @desc Returns the sum of consecutive integers
/// between m and n (inclusive).
///
/// @param {real} m integer
/// @param {real} n integer
///
/// @return {real} sum of integers
///
/// GMLscripts.com/license
function sum_interval(m, n)
{
return (abs(n - m) + 1) * (n + m) / 2;
}
Contributors: xot
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