Check out example codes for "printf n characters c". It will help you in understanding the concepts better.

Code Example 1

// Only 5 characters printed. When using %.*s, add a value before your string variable to specify the length.
printf("Here are the first 5 characters: %.*s\n", 5, mystr); //5 here refers to # of characters

Code Example 2

// Only 5 characters printed
const char * mystr = "This string is definitely longer than what we want to print.";
printf("Here are first 5 chars only: %.5s\n", mystr);

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