# A Program to display factorial of specified number using for loop in JAVA

A program to find factorial for an integer data-type using for loop in JAVA

## Algorithm for Factorial

Step 1: Start
Step 2: Read a number `n`
Step 3: Initialize variables: `i = 1`, `result = 1`
Step 4: if `i <= n` go to Step 4 otherwise go to Step 7
Step 5: Calculate `result = result * i`
Step 6: Increment the i by 1 (`i = i + 1`) and go to Step 3
Step 7: Display `result`
Step 8: Stop

As `1` is an identity for multiplication i.e whenever any number is multiply with 1, same value is obtained. For e.g `7 * 1 = 7` Thats why we assign `result = 1` as initial value

## Working example

``````/**
* Factorial for N using FOR loop
*/
class FactorialDemoUsingForLoop
{
public static void main(String[] args)
{
int i, result = 1, n = 5;

for (i = 1; i <= n; i += 1)
{
// System.out.println("I: " + i);
// System.out.println("Result B4: " + result);
result *= i;
// System.out.println("Result After: "+ result);
}

System.out.println("Factorial of " + n + ": " + result);
}
}
``````

### Output for number 5

``````Factorial of 5: 120
`````` A web geek, an industry experienced web developer & tutor/instructor residing in India 🇮🇳