strdup(): Duplicating string

We can duplicate a string by using strdup() string function.
duplicate_string = strdup(main_string);
Output is pointer of duplicate_string.
#include <stdio.h>
#include <string.h>
int main()
{
    char str1[] = "plus2net";
    char *str2;
    str2 = strdup(str1);

    printf("Duplicated string : %s", str2);
    return 0;
}
The output of above code is here
Duplicated string : plus2net
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