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# Factorial Program in Java || Java Programs

Factorial Program in Java: Factorial of n is the product of all positive descending integers. Factorial of n is denoted by n!. For example:

```4! = 4*3*2*1 = 24
5! = 5*4*3*2*1 = 120 ```

## Factorial Program using loop in java

Program -

```class FactorialExample{
public static void main(String args[]){
int i,fact=1;
int number=5;//It is the number to calculate factorial
for(i=1;i<=number;i++){
fact=fact*i;
}
System.out.println("Factorial of "+number+" is: "+fact);
}
}  ```

Output -

`Factorial of 5 is: 120`

## Factorial Program using recursion in java

Program -

```class FactorialExample2{
static int factorial(int n){
if (n == 0)
return 1;
else
return(n * factorial(n-1));
}
public static void main(String args[]){
int i,fact=1;
int number=4;//It is the number to calculate factorial
fact = factorial(number);
System.out.println("Factorial of "+number+" is: "+fact);
}
}  ```

Output -

`Factorial of 4 is: 24`

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