How can I create a "counter" program, using user input and for loop to increase/decrease a value?

Question

I'm trying to write a "counter" program that'll increase a positive integer by 1 whenever the user enters "increase" and decrease the value by 1 when "decrease" is entered.
I tried a while loop but as long as the expression says >= 0, it creates an endless loop.
How do I use a for loop to write the program, such that the value only increases/decreases by 1?

Answer 1

You may try something like this

count = 0
while (cominp:= input()) in ["increase","decrease"]:
if cominp == "increase":
count += 1
else:
count -= 1
print(count)