Task1/script.js at main · Priyanshii-dev/Task1 · GitHub

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let number1 = '';
let number2 = '';
let op = '';
let resultShown = false;

function press(value) {
  const display = document.getElementById('display');

  if (resultShown) {
    number1 = '';
    number2 = '';
    op = '';
    resultShown = false;
    display.value = '';
  }

  if (['+', '-', '*', '/'].includes(value)) {
    if (number1 !== '' && op === '') {
      op = value;
    }
  } else {
    if (op === '') {
      number1 += value;
    } else {
      number2 += value;
    }
  }

  display.value = number1 + op + number2;
}
function clearDisplay() {
  number1 = '';
  number2 = '';
  op = '';
  resultShown = false;
  document.getElementById('display').value = '';
}

function calculate() {
  const n1 = parseFloat(number1);
  const n2 = parseFloat(number2);
  let result = '';

  if (op === '+') {
    result = n1 + n2;
  } else if (op === '-') {
    result = n1 - n2;
  } else if (op === '*') {
    result = n1 * n2;
  } else if (op === '/') {
    result = n2 !== 0 ? n1 / n2 : 'Error';
  } else {
    result = 'Error';
  }

  document.getElementById('display').value = result;
  resultShown = true;
}