# Check whether product of integers from a to b is positive, negative or zero in Python

PythonServer Side ProgrammingProgramming

Suppose we have lower limit and upper limit of a range [l, u]. We have to check whether the product of the numbers in that range is positive or negative or zero.

So, if the input is like l = -8 u = -2, then the output will be Negative, as the values in that range is [-8, -7, -6, -5, -4, -3, -2], then the product is -40320 so this is negative.

To solve this, we will follow these steps −

• if l and u both are positive, then
• return "Positive"
• otherwise when l is negative and u is positive, then
• return "Zero"
• otherwise,
• n := |l - u| + 1
• if n is even, then
• return "Positive"
• return "Negative"

Let us see the following implementation to get better understanding −

## Example Code

Live Demo

def solve(l,u):
if l > 0 and u > 0:
return "Positive"
elif l <= 0 and u >= 0:
return "Zero"
else:
n = abs(l - u) + 1
if n % 2 == 0:
return "Positive"
return "Negative"

l = -8
u = -2
print(solve(l,u))

## Input

-8, -2


## Output

Negative
Published on 16-Jan-2021 09:13:56