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# Calculate the Sum

Calculator for the summation with the sum symbol Sigma, Σ. The sum is a repeated addition with a start value m and an end value n. As running variable, which is increased by 1 in each step, i is used, this must be an integer. Only this variable may occur in the sum term. The basic arithmetic operations + - * / are allowed, as well as the power function, like pow(2#i) for 2^{i}. Further allowed functions are sin(), cos(), tan(), asin(), acos(), atan() and log() for the natural logarithm. Also, the constants e and pi can be used.

An infinite sum is called series.

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