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js check balanced parenthesis

Adam, the developer answered on February 18, 2023 Popularity 3/10 Helpfulness 7/10

answer js check balanced parenthesis

js check balanced parenthesis

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// Javascript program for checking
// balanced brackets
  
// Function to check if brackets are balanced
function areBracketsBalanced(expr)
{
      
    // Using ArrayDeque is faster
    // than using Stack class
    let stack = [];
  
    // Traversing the Expression
    for(let i = 0; i < expr.length; i++)
    {
        let x = expr[i];
  
        if (x == '(' || x == '[' || x == '{')
        {
              
            // Push the element in the stack
            stack.push(x);
            continue;
        }
  
        // If current character is not opening
        // bracket, then it must be closing. 
        // So stack cannot be empty at this point.
        if (stack.length == 0)
            return false;
              
        let check;
        switch (x){
        case ')':
            check = stack.pop();
            if (check == '{' || check == '[')
                return false;
            break;
  
        case '}':
            check = stack.pop();
            if (check == '(' || check == '[')
                return false;
            break;
  
        case ']':
            check = stack.pop();
            if (check == '(' || check == '{')
                return false;
            break;
        }
    }
  
    // Check Empty Stack
    return (stack.length == 0);
}
  
// Driver code
let expr = "([{}])";
  
// Function call
if (areBracketsBalanced(expr))
    document.write("Balanced ");
else
    document.write("Not Balanced ");
  
// This code is contributed by rag2127

Popularity 3/10 Helpfulness 7/10 Language javascript

Source: www.geeksforgeeks.org

Tags: javascript

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Contributed on Feb 18 2023

Adam, the developer

0 Answers Avg Quality 2/10

js check balanced parenthesis

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