28 lines
547 B
C
28 lines
547 B
C
#include<stdio.h>
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int checkprime(int,int);
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int main()
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{
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int num,prime;
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printf("Enter a number: ");
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scanf("%d",&num);
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prime = checkprime(num,num/2);
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if(prime==1)
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printf("%d is a prime number",num);
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else
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printf("%d is not a prime number",num);
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return 0;
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}
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int checkprime(int num,int i)
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{
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if(i==1)
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{
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return 1;
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}
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else
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{
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if(num%i==0)
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return 0;
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else
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checkprime(num,i-1);
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}
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} |