This calculator is designed to be a versatile tool for various mathematical computations, ranging from basic arithmetic to more complex functions like powers, square roots, and factorials. It serves as a fundamental aid for students, educators, engineers, programmers, and anyone who needs to perform calculations accurately and efficiently.
Core Mathematical Operations
The calculator supports the following fundamental operations:
Addition (+): Combines two or more numbers. Formula: a + b
Subtraction (-): Finds the difference between two numbers. Formula: a - b
Multiplication (*): Repeated addition. Formula: a * b
Division (/): Splits a number into equal parts. Formula: a / b
Advanced Mathematical Functions
Beyond basic arithmetic, the calculator handles more specialized functions:
Power (^): Raises a number (base) to the power of another number (exponent). Formula: baseexponent. For example, 2^3 means 2 multiplied by itself 3 times (2 * 2 * 2 = 8).
Square Root (√): Finds the number that, when multiplied by itself, equals the given number. Formula: √n. For example, the square root of 9 is 3 because 3 * 3 = 9.
Factorial (!): The product of all positive integers less than or equal to a given non-negative integer. Formula: n! = n * (n-1) * (n-2) * ... * 1. For example, 5! = 5 * 4 * 3 * 2 * 1 = 120. Note that 0! is defined as 1.
Mathematical Notation Examples:
Addition: a + b
Subtraction: a – b
Multiplication: a * b
Division: a / b
Power: baseexponent (e.g., 23)
Square Root: √n (e.g., √9)
Factorial: n! (e.g., 5!)
Use Cases and Applications
Education: Assisting students in understanding and verifying calculations in algebra, calculus, and other mathematical subjects.
Engineering & Science: Performing quick calculations for formulas, data analysis, and problem-solving in scientific fields.
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}
inputFieldsContainer.innerHTML = htmlContent;
}
function calculateResult() {
var operationType = document.getElementById("operationType").value;
var result = "";
var error = "";
var resultDiv = document.getElementById("calculationResult");
var errorDiv = document.getElementById("errorMessage");
var resultSection = document.getElementById("resultSection");
errorDiv.style.display = 'none'; // Hide error initially
resultSection.style.display = 'none'; // Hide result initially
try {
if (operationType === "add") {
var operand1 = parseFloat(document.getElementById("operand1").value);
var operand2 = parseFloat(document.getElementById("operand2").value);
if (isNaN(operand1) || isNaN(operand2)) {
throw new Error("Please enter valid numbers for both operands.");
}
result = operand1 + operand2;
} else if (operationType === "subtract") {
var operand1 = parseFloat(document.getElementById("operand1").value);
var operand2 = parseFloat(document.getElementById("operand2").value);
if (isNaN(operand1) || isNaN(operand2)) {
throw new Error("Please enter valid numbers for both operands.");
}
result = operand1 – operand2;
} else if (operationType === "multiply") {
var operand1 = parseFloat(document.getElementById("operand1").value);
var operand2 = parseFloat(document.getElementById("operand2").value);
if (isNaN(operand1) || isNaN(operand2)) {
throw new Error("Please enter valid numbers for both operands.");
}
result = operand1 * operand2;
} else if (operationType === "divide") {
var operand1 = parseFloat(document.getElementById("operand1").value);
var operand2 = parseFloat(document.getElementById("operand2").value);
if (isNaN(operand1) || isNaN(operand2)) {
throw new Error("Please enter valid numbers for both operands.");
}
if (operand2 === 0) {
throw new Error("Division by zero is not allowed.");
}
result = operand1 / operand2;
} else if (operationType === "power") {
var base = parseFloat(document.getElementById("base").value);
var exponent = parseFloat(document.getElementById("exponent").value);
if (isNaN(base) || isNaN(exponent)) {
throw new Error("Please enter valid numbers for base and exponent.");
}
result = Math.pow(base, exponent);
} else if (operationType === "sqrt") {
var number = parseFloat(document.getElementById("singleOperand").value);
if (isNaN(number)) {
throw new Error("Please enter a valid number.");
}
if (number < 0) {
throw new Error("Cannot calculate the square root of a negative number in real numbers.");
}
result = Math.sqrt(number);
} else if (operationType === "factorial") {
var number = parseInt(document.getElementById("singleOperand").value, 10);
if (isNaN(number)) {
throw new Error("Please enter a valid integer.");
}
if (number 0; i–) {
result *= i;
}
}
}
resultDiv.textContent = result;
resultSection.style.display = 'block';
} catch (e) {
errorDiv.textContent = "Error: " + e.message;
errorDiv.style.display = 'block';
}
}
// Initialize input fields on page load
document.addEventListener('DOMContentLoaded', updateInputFields);