119 B
119 B
# let sum n =
if n = 0 then
0
else if n < 0 then
failwith "input must be positive"
else
n + sum(n-1)
# let sum n =
if n = 0 then
0
else if n < 0 then
failwith "input must be positive"
else
n + sum(n-1)