Someone can explain me why this code is correct in Balanced Parentheses?

Question

def balanced(expression):
count = 0
for char in expression:
if char == "(":
count += 1
elif char == ")":
if count == 0:
return False
count -= 1
return count == 0

print(balanced(input()))

Answer 1

Hi! because you have this algorithm for the program. when the left bracket occurs, the counter is incremented by 1, when the right -> 1 is taken away. the function returns when the balance of brackets matches (and it matches when their equal number and the counter is zero)