C program which will count the total number of vowels and numbers in a String

Programming code :

#include <stdio.h>
int main()
{
    char line[1000];
    int i, vowels=0,digits=0;



    printf("Enter a line of string: ");
    scanf("%s", line);

    for(i=0; line[i]!='\0'; ++i)
    {
        if(line[i]=='a' || line[i]=='e' || line[i]=='i' ||line[i]=='o' || line[i]=='u' || line[i]=='A' ||line[i]=='E' || line[i]=='I' || line[i]=='O' ||line[i]=='U')
        {
            ++vowels;
        }


         if(line[i]>='0' && line[i]<='9')
        {
            ++digits;
        }

    }

    printf("Vowels: %d",vowels);

    printf("\nDigits: %d",digits);


    return 0;
}

Output :