### What is Prime Number?

Prime Number is a number which is only divisible by itself and 1. For Example, 3,5,7 are Prime Numbers.

Note: 2 is the only even prime number.

### Algorithm for Checking Prime Number:

Step 1: Start
Step 2: Declare variables n, i, flag
Step 3: Initialize variables flag=1, i=2
Step 4: Read n from user
Step 5: If n<=1 // Any number below 1 is not prime
Display "n is not a prime number"
Goto step 7
Step 5: Repeat the steps until i<[(n/2)+1]
5.1 If remainder of n divide i equals to 0,
Set flag=0
Goto step 6
5.2 i=i+1
Step 6: If flag==0,
Display "n is not prime number"
Else
Display "n is prime number"
Step 7: Stop
### FlowChart for Prime Number Checking Algorithm:

For Prime Number Program in Python, visit here: Prime Number program in Python

For Prime Number Program in Javascript, visit here: Javascript Program to Check whether Number is Prime or Not