C Different Loop While

code:

#include<stdio.h>
int main()
{

    int number,sum=0;
    printf("Enter a positive number, negative to terminate:");
    scanf("%d",&number);
    while(number>=0)
    {
        sum=sum+number;
        printf("Enter a positive number, negative to terminate:");
        scanf("%d",&number);
    }
    printf("Sum is %d",sum);
    return 0;
}

code output:

Enter a positive number, negative to terminate:7
Enter a positive number, negative to terminate:3
Enter a positive number, negative to terminate:4
Enter a positive number, negative to terminate:1
Enter a positive number, negative to terminate:-1
Sum is 15
Process returned 0 (0x0)   execution time : 4.496 s
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