var currentExpression = ";
var calculatorMemory = 0;
// Global factorial function for eval()
function factorial(n) {
if (n < 0 || !Number.isInteger(n)) return NaN; // Factorial is for non-negative integers
if (n === 0) return 1;
var res = 1;
for (var i = 2; i <= n; i++) {
res *= i;
}
return res;
}
function updateDisplay() {
document.getElementById('display').value = currentExpression;
}
function appendChar(char) {
currentExpression += char;
updateDisplay();
}
function appendFunction(funcName) {
// For functions like sin, cos, log, sqrt, etc., append the function name and an opening parenthesis
// User is expected to close the parenthesis.
var jsFuncName = '';
switch (funcName) {
case 'sin': jsFuncName = 'Math.sin('; break;
case 'cos': jsFuncName = 'Math.cos('; break;
case 'tan': jsFuncName = 'Math.tan('; break;
case 'asin': jsFuncName = 'Math.asin('; break;
case 'acos': jsFuncName = 'Math.acos('; break;
case 'atan': jsFuncName = 'Math.atan('; break;
case 'log': jsFuncName = 'Math.log10('; break; // Base 10 log
case 'ln': jsFuncName = 'Math.log('; break; // Natural log
case 'sqrt': jsFuncName = 'Math.sqrt('; break;
default: return;
}
currentExpression += jsFuncName;
updateDisplay();
}
function applyUnaryOp(opType) {
if (currentExpression === '') return;
try {
var lastValue = eval(currentExpression); // Evaluate current expression to get the number
if (isNaN(lastValue) || !isFinite(lastValue)) {
currentExpression = 'Error';
updateDisplay();
return;
}
switch (opType) {
case 'sqr':
currentExpression = '(' + currentExpression + ')**2';
break;
case 'fact':
currentExpression = 'factorial(' + currentExpression + ')';
break;
case 'percent':
currentExpression = '(' + currentExpression + ')/100';
break;
case 'neg':
// If the expression already starts with a '-', remove it. Otherwise, add it.
if (currentExpression.startsWith('-(') && currentExpression.endsWith(')')) {
currentExpression = currentExpression.substring(2, currentExpression.length – 1);
} else if (currentExpression.startsWith('-')) {
currentExpression = currentExpression.substring(1);
} else {
currentExpression = '-(' + currentExpression + ')';
}
break;
default:
return;
}
updateDisplay();
} catch (e) {
currentExpression = 'Error';
updateDisplay();
}
}
function clearDisplay() {
currentExpression = '';
updateDisplay();
}
function deleteLastChar() {
currentExpression = currentExpression.slice(0, -1);
updateDisplay();
}
function calculateResult() {
try {
// Replace '^' with '**' for JavaScript's exponentiation operator
var expressionToEval = currentExpression.replace(/\^/g, '**');
// Evaluate the expression
var result = eval(expressionToEval);
if (isNaN(result) || !isFinite(result)) {
currentExpression = 'Error';
} else {
currentExpression = String(result);
}
} catch (e) {
currentExpression = 'Error';
}
updateDisplay();
}
function memoryAdd() {
try {
var valueToAdd = eval(currentExpression.replace(/\^/g, '**'));
if (!isNaN(valueToAdd) && isFinite(valueToAdd)) {
calculatorMemory += parseFloat(valueToAdd);
}
} catch (e) {
// Ignore errors for memory operations if current expression is invalid
}
}
function memorySubtract() {
try {
var valueToSubtract = eval(currentExpression.replace(/\^/g, '**'));
if (!isNaN(valueToSubtract) && isFinite(valueToSubtract)) {
calculatorMemory -= parseFloat(valueToSubtract);
}
} catch (e) {
// Ignore errors for memory operations if current expression is invalid
}
}
function memoryRecall() {
currentExpression = String(calculatorMemory);
updateDisplay();
}
function memoryClear() {
calculatorMemory = 0;
}
Online Scientific Calculator
Welcome to our online scientific calculator, a versatile tool designed to handle a wide range of mathematical, scientific, and engineering calculations. Unlike a basic calculator, a scientific calculator includes functions for trigonometry, logarithms, exponents, and more, making it indispensable for students, professionals, and anyone needing advanced computational power.
How to Use This Scientific Calculator
Our calculator is designed for intuitive use, allowing you to input expressions naturally. Here's a guide to its features:
Basic Operations:
Numbers (0-9) and Decimal Point (.): Enter your numerical values.
Parentheses ((, )): Use parentheses to define the order of operations, ensuring complex expressions are evaluated correctly (e.g., (5 + 3) × 2).
Equals (=): Press this button to calculate the result of your entered expression.
Scientific Functions:
Trigonometric Functions (sin, cos, tan): Calculate sine, cosine, and tangent. Note: These functions operate in radians. If you need to calculate with degrees, convert your angle to radians first (e.g., sin(30 * π / 180) for 30 degrees).
Square Root (√): Calculates the square root of a number (e.g., sqrt(81)).
Exponents (xʸ, x²):
xʸ (represented as ^): Use this for general exponentiation (e.g., 5^3 for 5 to the power of 3).
x²: Squares the current expression (e.g., if display shows 5, pressing x² makes it (5)**2).
Factorial (x!): Calculates the factorial of a non-negative integer (e.g., 5! for 5 × 4 × 3 × 2 × 1).
Percentage (%): Converts the current expression to a percentage (divides by 100).
Sign Change (+/-): Toggles the sign of the current expression.
Constants:
π (Pi): Inserts the mathematical constant Pi (approximately 3.14159).
e (Euler's Number): Inserts Euler's number (approximately 2.71828).
Memory Functions:
MC (Memory Clear): Clears the stored memory value.
MR (Memory Recall): Recalls the value stored in memory and displays it.
M+ (Memory Add): Adds the current display value to the memory.
M- (Memory Subtract): Subtracts the current display value from the memory.
Clear Functions:
C (Clear): Clears the entire display and resets the current expression.
DEL (Delete): Deletes the last character entered.
Examples of Calculations:
Here are a few examples to demonstrate the calculator's capabilities:
Basic Arithmetic:
To calculate (15 + 7) × 3: Type (15+7)*3=. Result: 66
Trigonometry:
To find sin(π/2): Type sin(π/2)=. Result: 1
To find cos(60 degrees): Type cos(60*π/180)=. Result: 0.5
Logarithms:
To calculate log(1000): Type log(1000)=. Result: 3
To calculate ln(e^2): Type ln(e^2)=. Result: 2
Exponents and Roots:
To calculate 4^3: Type 4^3=. Result: 64
To calculate sqrt(144): Type sqrt(144)=. Result: 12
To calculate 5²: Type 5 then press x²=. Result: 25
Factorial:
To calculate 7!: Type 7 then press x!=. Result: 5040
Benefits of Using an Online Scientific Calculator:
Accessibility: Available anytime, anywhere with an internet connection, without needing a physical device.
Accuracy: Provides precise calculations for complex mathematical problems.
Efficiency: Quickly perform advanced operations that would be time-consuming or difficult to do manually.
Versatility: Supports a broad spectrum of functions essential for various academic and professional fields.
Whether you're solving equations, analyzing data, or working on engineering projects, our online scientific calculator is here to simplify your computations and enhance your productivity.