Given two non-zero integers, print "YES" if exactly one of them is positive and print "NO" otherwise (Python)

Question

First time asking a question on stackoverflow. I am stuck trying to solve this. This is my code:

a = int(input()) 
b = int(input())

Given two non-zero integers, print "YES" if exactly one of them is positive and print "NO" otherwise.

if (a > 0) or (b > 0):
    print('YES') 
else:
    print('NO')

@Blacksilver That comment, expanded a little, would make a better answer than the other answers on this question. — khelwood, Feb 19 '19 at 21:52

SIGSTACKFAULT · Answer 1 · 2019-02-20T17:29:02.717

3

if (a>0) != (b>0):
    print("YES")
else:
    print("NO")

How do you get the logical xor of two variables in Python?

edited Feb 20 '19 at 17:29

answered Feb 19 '19 at 21:53

SIGSTACKFAULT

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score 1 · Answer 2 · answered Feb 19 '19 at 21:45

1

You could do this with more complex Boolean operations, but having multiple conditions is the simplest way:

a = int(input())
b = int(input())

if (a > 0 and b < 0) or (a < 0 and b > 0):
    print('YES')
else:
    print('NO')

answered Feb 19 '19 at 21:45

iz_

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score 1 · Answer 3 · edited Feb 19 '19 at 21:51

1

print('YES' if a * b < 0 else 'NO')

edited Feb 19 '19 at 21:51

acushner

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answered Feb 19 '19 at 21:50

Henk_Jan

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This would print Yes is they were both negative unfortunately. – Matt Hall Feb 19 '19 at 22:11
my python interpreter says no. i tested it with pythonista and a=-1 b=-2 – Henk_Jan Feb 20 '19 at 17:41

score 1 · Answer 4 · answered Feb 19 '19 at 21:53

Tomothy32's answer is the best approach for sure as-goes simplicity and more importantly, understandability. But here's another way of doing the same thing, just to illustrate how another programmer might do this:

onePositive = ( (a > 0 and b < 0) or (a < 0 and b > 0) )

print('yes' if onePositive else 'no' )

score 0 · Answer 5 · edited Feb 19 '19 at 22:46

Not the fastest solution or 1-liner but will help you understand my thought process in solving the problem given exactly 2 non zero integers, print yes if exactly one of them is positive and no otherwise.

Solution - you want EXACTLY ONE POSITIVE MEANING THE OTHER ONE MUST BE NEGATIVE if both integers are NON-ZERO

a = int(input())
b = int(input())

#if a is positive and b and negative
if (a > 0) and (b < 0) :
    print('YES')
#if a is negative and b is positive
elif (a < 0) and (b > 0) :
    print('YES')
else :
    print('NO')

Given two non-zero integers, print "YES" if exactly one of them is positive and print "NO" otherwise (Python)

5 Answers5