factorial number in java
int num1 = 6;
int num2 = 1;
for(int a = 1; a<=num1; a++) {
num2 = num2 * a;
}
System.out.println(num2);factorial number in java
int num1 = 6;
int num2 = 1;
for(int a = 1; a<=num1; a++) {
num2 = num2 * a;
}
System.out.println(num2);factorial method library in java
2.4. Factorial Using Apache Commons Math
Apache Commons Math has a CombinatoricsUtils class with a static factorial method that we can use to calculate the factorial.
To include Apache Commons Math, we'll add the commons-math3 dependency into our pom:
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-math3</artifactId>
<version>3.6.1</version>
</dependency>
Let's see an example using the CombinatoricsUtils class:
public long factorialUsingApacheCommons(int n) {
return CombinatoricsUtils.factorial(n);
}Copyright © 2021 Codeinu
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