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43 lines
922 B
C
43 lines
922 B
C
/* Prime number - Program to print first n prime numbers */
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/* Assume 2 is a prime number but 0 and 1 are not */
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#include <stdio.h>
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#include <conio.h>
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void main()
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{
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int i, n, p, d, flag ;
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clrscr() ;
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printf("Enter n: ") ;
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scanf("%d",&n) ;
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printf("First %d prime numbers are as follows: \n",n) ;
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p=2 ;
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i=1 ;
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while(i<=n)
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{
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flag=1 ;
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for(d=2 ; d<=p-1 ; d++) /* d<=p/2 is also correct */
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if(p%d==0) /* True if number is not prime */
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{
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flag=0 ;
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break ; /* Loop terminates if p is not prime */
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}
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if(flag==1)
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{
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printf("%d ",p) ;
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i++ ;
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}
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p++ ;
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}
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getch() ;
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}
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/*
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Output:
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Enter n: 7
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First 7 prime numbers are as follows:
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2 3 5 7 11 13 17
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*/
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