#include <stdio.h>
#include <string.h>

int main() {
    int arr1[10];
    arr1[0] = 4;
    arr1[1] = 10;
    printf("%d %d\n", arr1[0], arr1[1]);

    int arr2[10];
    for(int i=0;i<10;i++){
        scanf("%d", &arr2[i]);
        printf("%d\n", arr2[i]);
    }

    int arr3[10] = {10, 20, 30};
    for(int i=0;i<10;i++){
        printf("%d\n", arr3[i]);
    }

    int arr4[] = {100, 200};
    for(int i=0;i<sizeof(arr4)/sizeof(arr4[0]);i++){
        printf("%d\n", arr4[i]);
    }

    char arr_c[10];
    scanf("%s", arr_c);
    printf("%s\n", arr_c);
    for(int i=0;i<10;i++){
        printf("%c\n", arr_c[i]);
    }

    char a = 'A';
    printf("%c\n", a);
    printf("%d\n", a);

    char b = 'b';
    if(b >= 'a' && 'z' >= b){
        printf("소문자이다.\n");
    }

    char c[10] = "hello";
    int len = strlen(c);
    printf("%d\n", len);















    
    
}