Question

what is parentheses checker?why it is needed?​

Answer 1

Answer:

$\huge\underline\bold\red{ANSWER}$

Declare a character stack S. ... If the current character is a starting bracket ('(' or '{' or '[') then push it to stack. If the current character is a closing bracket (')' or '}' or ']') then pop from stack and if the popped character is the matching starting bracket then fine else parenthesis are not balanced.