# PHP Program to Check Prime Number

## What is Prime Number?

A positive integer that is divisible only by itself and 1.

**Tips**: It is recommended to use our online Prime Numbers calculator for better understanding.

## Examples

The following table provides few examples of prime numbers.

Number | Divisor | Result |
---|---|---|

13 | 1, 13 | Prime Number |

15 | 1, 3, 5, 15 | Not a Prime Number |

47 | 1, 47 | Prime Number |

## Using for loop

In the following example, we will check whether the given number (7) is a Prime number or not using for loop.

### Example

## Using while loop

In the following example, we will check whether the given number (7) is a Prime number or not using while loop.

### Example

## Using do while loop

In the following example, we will check whether the given number (7) is a Prime number or not using do while loop.

### Example

## Prime Numbers between the Given Range

In the following example, we will find all the Prime numbers between 1 and 20.

### Example

## Check Whether the Given Number is Prime or Composite

In the following example, we will check whether the given number is a Prime number or Composite number.

### Example

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