C Program to find List Of Prime Numbers Based On User Input Limit

C Program To Find List Of Prime Numbers Upto Limit

This c program is used to find the prime numbers upto the user input limit.

A number greater than 1 is called a prime number, if it has exactly two factors, namely 1 and the number itself.

#include<stdio.h>                                                               
                                                                                                                                                                                                                                                                          
void main()                                                                     
{                                                                               
  int i, j, limit;                                                              
  int prime = 0;                                                                
  printf("Enter limit: ");                                                      
  scanf("%d", &limit);                                                          
                                                                                
  printf("Prime Numbers upto (%d): ", limit);                                   
  for(i = 2;i <= limit;i++)                                                     
  {                                                                             
    prime = 0;                                                                  
    for(j = i-1; j > 1 ; j--)                                                   
    {                                                                           
       if(i%j == 0)                                                             
         prime = 1;                                                             
    }                                                                           
    if(prime == 0)                                                              
     printf("%d\t", i);                                                         
  }                                                                             
  printf("\n");                                                                 
}                                                                      
Output:
$ cc prime-numbers-list.c
$ ./a.out 
Enter limit: 100
Prime Numbers upto (100): 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	

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