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  1. #include <stdio.h>
  2. int main()
  3. {
  4.     int low, high, i, flag;
  5.     printf("Enter two numbers(intervals): ");
  6.     scanf("%d %d", &low, &high);
  7.  
  8.     printf("Prime numbers between %d and %d are: ", low, high);
  9.  
  10.     while (low < high)
  11.     {
  12.         flag = 0;
  13.  
  14.         for(i = 2; i <= low/2; ++i)
  15.         {
  16.             if(low % i == 0)
  17.             {
  18.                 flag = 1;
  19.                 break;
  20.             }
  21.         }
  22.  
  23.         if (flag == 0)
  24.             printf("%d ", low);
  25.  
  26.         ++low;
  27.     }
  28.  
  29.     return 0;
  30. }
Success #stdin #stdout 0s 10320KB
comments (?)
stdin
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20
40
stdout
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Enter two numbers(intervals): Prime numbers between 20 and 40 are: 23 29 31 37
https://ideone.com/NBUhbj
language:
C (gcc 8.3)
created:
6 years ago
visibility:
public

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