Prime Number

Prime Number :
     Prime Number is a positive number ( >0 ) that is divisible only by 1 and itself.

Example 1:
       We will consider the number 5.
       The Number 5 is exactly divisible only by 1 and 5 (itself). No other numbers less than 5 (2,3,4) can divide 5. SO 5 is a perfect prime number.

Example 2:
       We will consider the number 6.
       The Number 6 is exactly divisible only by 2 and 3, other than 1 and 6. SO 6 is a not a prime number.