Write a C program to find the first n prime numbers, In this C program example, we will learn Algorithm and C Code to find first n prime number.

Algorithm to find the first n prime numbers

• Declare three variables.
• Take an input.
• Take two for loop and in 2d loop take two if condition, first one for condition and break and the second one for print with an appropriate message.

C program to find first n prime numbers

#include<stdio.h>
void main (){
    int i,n,j;
    printf("enter number:");
    scanf("%d",&n);
    for(i=2;i<=n;i++){
        for(j=2;j<=i;j++){
        
        if(i%j==0){
            break;
        }
        }
        if(i==j){
            printf("%d\n",i);
        }

    }
}

Sample input

Enter any value: 25

Sample output

2
3
5
7
11
13
17
19
23

Explanation of this C program

step 1: Start.

Step 2: Create a header file and include a library on file.

Step 3: Create a void main function.

Step 4: Declare three variable (i,n,j).

Step 5: Then create an input with the help of scanf for taking value from the user to find first n prime number.

Step 6: Create two for loop and give conditions.

Step 7: In the loop create two if statements one for cheak condition and brack it and the second one for print the first n prime number.

Step 8:  End.

Output

In this way, we learned how to write a C program to find the first n number.