# Sigma

This page computes a finite or infinite sum over the index n. This sum can be a numerical or symbolic (for example a power series).

To a sum, enter first the expression of its general term: ( Examples )

f (n) =

Then choose the type of the sum to compute.

• Infinite series, for n starting with .
• Finite sum, for n running through integers from to ,
Numerical precision: digits.