Alternating harmonic series uses symsum

I want to do an alternating series using just symsum, but I've seen a lot of complicated code for it.

Is there a way to define variable and use symsum for 1-1/2+1/3...?

Answer 1

[Walter Roberson]

syms m n integer
result = symsum((-1)^(n+1)/n, n, 1, m)

result = 

result = symsum((-1)^(n+1)/n, n, 1, inf)

result = 

[Cassandra Meyer]

Thank you! tried something similar but might have missed a parathenses.