how to return character array in c language

example1

// function that return array of char in C language
char * createStr() {

    char char1= 'm';
    char char2= 'y';

    char *str = malloc(3);
    str[0] = char1;
    str[1] = char2;
    str[2] = '\0';

    return str;

}

example2

/*
Example: return char array in C language
*/
#include <stdio.h>
#include <stdlib.h>

char *foo(int count) {
    char *ret = malloc(count);
    if(!ret)
        return NULL;

    for(int i = 0; i < count; ++i)
        ret[i] = i+'0';

    return ret;
}

int main(){
    int count = 5;
    char* chrArr = foo(count);
    printf("%s",chrArr);
    return 0;
}

example of output:

01234
Process returned 0 (0x0)   execution time : 0.091 s