The Arithmetic Calculator is a fundamental tool used to perform basic mathematical operations. It takes two numerical inputs and an arithmetic operator, then computes the result based on the chosen operation.
How it Works:
This calculator is designed to handle four primary arithmetic operations:
Addition (+): Combines two numbers to find their sum. For example, 5 + 3 = 8.
Subtraction (-): Finds the difference between two numbers. For example, 10 – 4 = 6.
Multiplication (*): Calculates the product of two numbers. For example, 6 * 7 = 42.
Division (/): Determines how many times one number contains another. For example, 15 / 3 = 5. Special care is taken to avoid division by zero.
Mathematical Principles:
The calculator implements the standard order of operations for simple binary operations. The core logic involves:
Retrieving the first number (operand 1).
Retrieving the second number (operand 2).
Retrieving the selected operator.
Performing the calculation based on the operator.
Handling potential errors, such as division by zero, which is mathematically undefined.
Use Cases:
An arithmetic calculator is indispensable in numerous scenarios:
Everyday Calculations: Quickly figuring out bills, splitting costs, or managing personal finances.
Educational Purposes: Helping students learn and practice basic math skills.
Quick Checks: Verifying calculations in more complex tasks without needing advanced software.
Programming and Development: As a simple yet essential component in software applications.
This tool simplifies numerical tasks, making them accessible and efficient for everyone.
function calculateArithmetic() {
var num1 = parseFloat(document.getElementById("number1").value);
var operator = document.getElementById("operator").value;
var num2 = parseFloat(document.getElementById("number2").value);
var result = "";
var resultValueElement = document.getElementById("result-value");
if (isNaN(num1) || isNaN(num2)) {
result = "Invalid input. Please enter valid numbers.";
} else {
if (operator === "add") {
result = num1 + num2;
} else if (operator === "subtract") {
result = num1 – num2;
} else if (operator === "multiply") {
result = num1 * num2;
} else if (operator === "divide") {
if (num2 === 0) {
result = "Error: Cannot divide by zero.";
} else {
result = num1 / num2;
}
}
}
if (result === "Error: Cannot divide by zero." || result.toString().startsWith("Invalid input")) {
resultValueElement.style.color = "#dc3545"; // Red for errors
resultValueElement.textContent = result;
} else {
resultValueElement.style.color = "#28a745"; // Green for success
resultValueElement.textContent = result;
}
}