45.WAP to display sum of following series(Sum of Inverse Factorial Series with simultaneous sign)

 s=1/1! - 1/2! + 1/3! - 1/4! + ....

CODE:

sum=0
fact=1
sign=1
n=int(input("How many terms?\n"))
for i in range(1,n+1):
    fact=fact*i
    sum=sum+(sign*(1/fact))
    sign=-sign

print("Sum of series is ",sum)

OUTPUT:

How many terms?
2
Sum of series is  0.5