Write a program, input a positive integer from the keyboard, and calculate the sum of all prime numbers between 2 and n

#include<stdio.h>
int main()
{
    
    
	int n,i,j;
	int sum=0;
	scanf("%d",&n);
	for(i=2;i<=n;i++){
    
    
		for(j=2;j<=i-1;j++){
    
    
			if(i%j==0) break;
		}
		if(j>i-1){
    
    
			sum+=i;
		}
	}
	printf("素数之和=%d",sum);
	return 0;
}