declare string in c

1char greeting[6] = {'H', 'e', 'l', 'l', 'o', '\0'};
2char greeting[] = "Hello";

1#include <stdio.h>
2
3int main(void) {
4  char name[] = "Harry Potter";
5
6  printf("%c", *name);     // Output: H
7  printf("%c", *(name+1));   // Output: a
8  printf("%c", *(name+7));   // Output: o
9
10  char *namePtr;
11
12  namePtr = name;
13  printf("%c", *namePtr);     // Output: H
14  printf("%c", *(namePtr+1));   // Output: a
15  printf("%c", *(namePtr+7));   // Output: o
16}

1#include <stdio.h>
2int main()
3{
4    char name[30];
5    printf("Enter name: ");
6    fgets(name, sizeof(name), stdin);  // read string
7    printf("Name: ");
8    puts(name);    // display string
9    return 0;
10}
11

1#include <stdio.h>
2void displayString(char str[]);
3
4int main()
5{
6    char str[50];
7    printf("Enter string: ");
8    fgets(str, sizeof(str), stdin);             
9    displayString(str);     // Passing string to a function.    
10    return 0;
11}
12void displayString(char str[])
13{
14    printf("String Output: ");
15    puts(str);
16}
17

1char string[20];

1char c[100];
2c = "C programming";  // Error! array type is not assignable.