Prime Number using C++ Programming

This program generates and prints prime numbers between 1 and 100. Here's how it works:

  • Declare two integer variables n and c and initialize c to 0.
  • Use a for loop to iterate through each integer n between 1 and 100 (inclusive).
  • For each value of n, use another for loop to iterate through each integer i between 1 and n (inclusive).
  • For each value of i, check if n is divisible by i. If it is, increment c by 1.
  • After the inner loop completes, check if c is equal to 2. If it is, n is prime, so print it to the console.
  • Reset c to 0 and continue with the outer loop until all values of n between 1 and 100 have been checked.

Note that the program is using the fact that a number is prime if it has exactly two divisors, namely 1 and itself.

Source Code

//Program for prime number between 1-100
#include<iostream>
using namespace std;
int main()
{
    int n,c=0;
    for(n=1; n<=100; n++)
    {
 
        for(int i=1; i<=n; i++)
        {
            if(n%i==0)
                c++;
        }
        if(c==2)
        {
            cout<<n<<endl;
        }
        c=0;
    }
    return 0;
}
 

Output

2
3
5
7
11
13
17
19
23
29
31
37
41
43
47
53
59
61
67
71
73
79
83
89
97
To download raw file Click Here

Program List

Flow Control

IF Statement Examples

Switch Case

Goto Statement

Break and Continue

While Loop

Do While Loop

For Loop

Friend Function in C++

String Examples

Array Examples

Structure Examples

Structure & Pointer Examples

Structure & Functions Examples

Enumeration Examples

Template Examples

Functions

Inheritance Examples

Hierarchical Inheritance

Hybrid Inheritance

Multilevel Inheritance

Multiple Inheritance

Single Level Inheritance

Class and Objects

Constructor Example

Destructor Example

Operator Overloading Example

Operator and Function Example

List of Programs

Pointer Examples

Memory Management Examples

Pointers and Arrays

Virtual Function Examples

Learn All in Tamil © Designed & Developed By Tutor Joes | Privacy Policy | Terms & Conditions