Commenting Your Programs
We insert comments to document programs and improve their readability. The Java compiler ignores comments, so they do not cause the computer to perform any action when the program is run.
By convention, we begin every program with a comment indicating the figure number and filename. The comment in line 1
// Fig. 2.1: Welcome1.java
begins with //, indicating that it’s an end-of-line comment—it terminates at the end of the line on which the // appears. An end-of-line comment need not begin a line; it also can begin in the middle of a line and continue until the end (as in lines 6, 10 and 11). Line 2
// Text-printing program.
by our convention, is a comment ...
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