``` 15 a,b=10,15 20 a,b+=b,a ``` It's obvious from the example above that after skipping both the **LET** keyword and the long form of assignment, our program suddenly became more readable and much easier to write! ### Labels Apart from the line numbers (which we will see how to refer – and jump to – in the following sections) sometimes we need a way to identify and/or jump to a selected *NextBASIC* statement, maybe even within a multi-statement line. For this reason, *NextBASIC* provides us with a facility called *labels*. Labels are identified by the **at** (@) symbol prefix and a name following the naming guidelines for a *procedure* (See Chapter 4) and they are defined within a program starting with either the line number or the **colon** *statement separator* ( **:** ) if they're not defined at the start of a line. Their definition can appear anywhere within a program: ``` 20 @onelabel: PRINT a+b 30 PRINT a+b: @anotherlabel ``` Labels can be used in lieu of line numbers with the following keywords: **GO TO**, **BANK...GO TO**, **GOSUB**, **BANK...GOSUB**, **LIST**, **BANK...LIST**, **SAVE...LINE**[^p8-2] and **EXIT**. See relevant section for each keyword's proper syntax. **BANK** commands are all discussed in length in *Chapter 23 – The Memory* ### Using LIST, RUN and cursors to edit and run programs Going back to our program, you will need to change line 20 to: ``` 20 PRINT a+b ``` You could type out the replacement in full, but it is easier to move the cursor (using the cursor keys) to just after the **a**, and then type: ``` +b (without ENTER) ``` The line at the bottom should now read: ``` 20 PRINT a+b ``` Press **ENTER** and it will replace the old line 20, so that the screen looks like this:  ``` 10 LET a=10 15 b=15 20 PRINT a+b NextBASIC ``` *Fig. 2 – Editing a program* [^p8-2]: *In the case of SAVE...LINE@label, the saved program will autostart from the beginning of the line that contains the label even if it's not the first statement in the line ²*