Casio FX-991ZA Plus Calculator
Use this calculator to perform a wide variety of calculations, including scientific, algebraic, and financial functions, all in one device.
Addition
Subtraction
Multiplication
Division
Square
Square Root
function calculate() {
const input = parseFloat(document.getElementById(“inputValue”).value);
const operation = document.getElementById(“operation”).value;
let result;
if (isNaN(input)) {
alert(“Please enter a valid number.”);
return;
}
switch (operation) {
case “add”:
result = input + input;
break;
case “subtract”:
result = input – input;
break;
case “multiply”:
result = input * input;
break;
case “divide”:
result = input / input;
break;
case “square”:
result = input * input;
break;
case “sqrt”:
result = Math.sqrt(input);
break;
default:
result = “Invalid operation.”;
break;
}
document.getElementById(“result”).value = result;
}
function resetCalculator() {
document.getElementById(“inputValue”).value = ”;
document.getElementById(“result”).value = ”;
document.getElementById(“operation”).selectedIndex = 0;
}
