“Kalkulator JavaScript” Kod odpowiedzi

Kalkulator JavaScript

let screen = document.getElementById('screen');
buttons = document.querySelectorAll('button');
let screenValue = '';
for (item of buttons) {
    item.addEventListener('click', (e) => {
        buttonText = e.target.innerText;
        console.log('Button text is ', buttonText);
        if (buttonText == 'X') {
            buttonText = '*';
            screenValue += buttonText;
            screen.value = screenValue;
        }
        else if (buttonText == 'C') {
            screenValue = "";
            screen.value = screenValue;
        }
        else if (buttonText == '=') {
            screen.value = eval(screenValue);
        }
        else {
            screenValue += buttonText;
            screen.value = screenValue;
        }

    })
}
Foolish Fowl

Funkcja kalkulatora JS JavaScript

function calculate(number1,number2,operator){
if (!number1 || !number2){
    return "Invalid number"
}
if (!['*','-','/','+'].includes(operator)){
    return "Invalid operator"
}
switch(operator){
  case "+":
    return number1 + number2;
  case "/":
    return number1 * number2;
  case "*":
    return number1 * number2;
  case "-":
    return number1 - number2;
 }
}
console.log(calculate(5,6,"+"))
Grumpy Grebe

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