(C language) Write a function isprime, the function is to determine if a number is a prime number, if it returns 1, otherwise returns 0. In the main function, the function implemented by the main function is to output all the numbers between 100-300, and 6 data is displayed per line.

Write a function isprime,
function is to determine if a number is a prime number, if it returns 1, otherwise returns 0.
Call in the main function, the function of the main function implementation is:
Outputs all the numbers between 100-300, and 6 data is displayed per line.

#include<stdio.h>
#include<math.h>

int IsPrime(int x)  // Function, determine if a number is the number of prime, if it is returned 1, otherwise returns 0
{
	int i,k; 
	k=sqrt(x);
	for(i=2; i<=k; i++)
		if(x%i==0)  return 0;
	return 1;	   // Notice to write into Else Return 1; it is wrong! ! Error !!
}

int main()
{
	int y, j=0;
	for(y=101; y<=300; y+=2)
		if( IsPrime(y))   //	if( IsPrime(y)==1)
		{
			printf("%d ", y);
			j++;
			if(j%6==0) printf("\n");
		}

	return 0;
}

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