評論程式碼

/* 
In all versions of 
Progress ABL you can write 
multi line comments 
*/

/* They can also span a single line */

//Starting with version 11.6 you can also write single line comments

//Can you nest single line comments? //Yes you can

string = "HELLO". //A single line comment can be written after some code

string2 = "Goodbye". /* And the same thing
goes for multi line comments. A difference is 
that a multi line comment also can preceed some code */ i = 1.

/* Is it possible to mix comments? 
//Yes, but multi line comments always needs to be terminated! */

/* You can nest multi line comments as well
/* but then all nested comments must be terminated */ or the compiler 
will generate an error */

正式單行註釋以雙斜槓//開頭，以換行符，回車符或檔案結尾結束。