Simple Calculator

A basic calculator in Java with 8 operations: arithmetic, power, modulo, square root, and factorial.

Features

Operation	Method	Example
Addition	add(a, b)	2 + 3 = 5
Subtraction	subtract(a, b)	10 - 4 = 6
Multiplication	multiply(a, b)	3 * 7 = 21
Division	divide(a, b)	20 / 4 = 5.0
Power	power(a, b)	2 ^ 10 = 1024
Modulo	modulo(a, b)	17 % 5 = 2
Square root	squareRoot(a)	sqrt(16) = 4.0
Factorial	factorial(a)	5! = 120

Division throws IllegalArgumentException when dividing by zero.

How to run

Requires Java 8 or newer.

javac Calculator.java
java Calculator

How to use as a library

Calculator calc = new Calculator();
int sum   = calc.add(2, 3);          // 5
double q  = calc.divide(20, 4);      // 5.0
int p     = calc.power(2, 10);       // 1024
long f    = calc.factorial(5);       // 120

Requirements

• JDK 8+

Author

Zhameer Sheraz Tampugao — github.com/zhameersheraz

License

MIT — see LICENSE.