There are two ways insert comments into Gamma code. To comment out a line, you can use a double slash ( // ) like this:

a = 5;
b = 7;

// This assigns the value of c.

c = a + b;

To comment out a block of text, you can put the symbol /* at the beginning, and */ at the end, like this:

a = 5;
b = 7;

/* This assigns the value of c,
   which is very important to the
   future of our project.*/

c = a + b;

It is not permitted to put an unmatched double quote mark ( " ) into the second type of comment. This is a feature that allows you to comment out a string, to include a comment mark in a string, and even to comment out a string that includes comment characters, like this: /* princ ("/* this is what a comment looks like\n"); princ (" when extended to multiple lines\n"); princ ("*/\n"); */