26 lines
532 B
Java
26 lines
532 B
Java
package Maths;
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public class Factorial {
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public static void main(String[] args) {
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int n = 5;
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System.out.println(n + "! = " + factorial(n));
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}
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/**
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* Calculate factorial
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*
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* @param n the number
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* @return the factorial of {@code n}
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*/
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public static long factorial(int n) {
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if (n < 0) {
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throw new ArithmeticException("n < 0");
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}
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long fac = 1;
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for (int i = 1; i <= n; ++i) {
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fac *= i;
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}
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return fac;
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}
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}
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