# Sum of a series

From Fōrmulæ wiki

This page is the answer to the task Sum of a series in the Rosetta Code.

### Description (from Rosetta Code)

Compute the n^{th} term of a series, i.e. the sum of the n first terms of the corresponding sequence.
Informally this value, or its limit when For this task, use:
And compute This approximates the zeta function for S=2, whose exact value
is the solution of the Basel problem. |

### Program

The series is provided as a lambda expression.

### Test case

Forcing to give a decimal result:

### Another case

The following approximates to the value of