Final answer:
Data is passed to the printf() and putchar() functions differently.
Step-by-step explanation:
When passing data to the printf() function in C, you can specify the data to be printed directly in the function call using format specifiers. For example, to print a string, you would use the '%s' format specifier and provide the string as an argument.
On the other hand, when passing data to the putchar() function, you pass a single character as an argument, and the function prints that character.