It is good programming practice to document your C code with comments that are useful for explaining the purpose of the function. In a single line of code, your comments must begin with the /* identifier, followed by text, and end with the */ identifier as shown by the following:

/* This is how I put a comment in my C program */ 

Comments that span multiple lines are bracketed by the same identifiers:

/* This is how I put a comment in my C program
 that spans more
 than one line.  */