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Write a C program to generate all the prime numbers between 1 and n, where n is a value supplied by the user

4 Comments Posted by Chandan Pasunoori on March 20, 2011


/* Write a C program to generate all the prime numbers between 1 and n, where n is a value supplied by the user. */
#include<stdio.h>
int main()
{
int n,i,j;
printf("enter number for prime : ");
scanf("%d",&n);
if(n==0)
{
printf("invalid number entered");
return 0;
}
printf("1 ");
for(i=2;i<=n;i++)
{
for(j=2;j<=i;j++)
{
if(i%j==0)
{
if(i==j)
{
printf("%d ",j);
}
break;
}
}
}
return 0;
}

4 responses to “Write a C program to generate all the prime numbers between 1 and n, where n is a value supplied by the user”

rahul November 17, 2011 at 20:08
this program cant give prime nos after 2… it gives only 1 and 2 ……. so plz check it again and tell me correct one……..

Reply
- Chandan Pasunoori November 23, 2011 at 18:56
  code is updated, check it once…
  
  Reply
steven January 31, 2012 at 10:28
1. write a program to generate the first 10 all integer
2. write a program to compute s=1/2+2/4+3/6…..21/22

Reply
- Chandan Pasunoori February 7, 2012 at 19:35
  #include
  void main()
  {
  int i;
  for(i=0;i<=10;i++)
  printf("\n%d",i);
  }
  
  #include
  void main()
  {
  int i,s=0;
  for(i=1;i<=21;i++)
  s=s+(i/2*i) ;
  printf("\n%d",s);
  }
  
  Reply