How to properly copy text in C

main.c

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

int main(int argc, char* argv[]) {
    char text1[50];
    char text2[] = "Temp";
    char text3[16] = "Hello this world";
    
    char* p;
    for (p = text3; p < text1 + 20; p++) {
        printf("%c ", *p);
    }
    printf("\n");
    
    // Full copy
    // strcpy(text1, text3);
    
    
    // Partial copy
    strncpy(text1, text3, 16);
    text1[16] = '\0';
    
    printf("%s\n%s\n%s\n", text1, text2, text3);
    
    return 0;
}