C 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
Output
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
Output
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
Output
Prime Numbers between the Given Range
In the following example, we will find all the Prime numbers between 1 and 20.
Example
Output
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
Output
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