44 Once you have entered a program you will very often find that the line numbers are no longer in a numeric sequence. As we have seen the command RENUMBER makes the computer go through the whole program changing all the line numbers so that they start at line 10 and increase by 10 for each successive line. When you have finished a program it is a good idea to RENUMBER it. If you have a program in the computer try RENUMBER RETURN and then LIST the program to see the effect.
After that try RENUMBER 900,100 RETURN and you will see, when you list the program, that the computer has renumbered the whole program but the new version has line numbers starting at 900 and this time increasing by steps of 100. It is possible to put more than one statement on a line. For example, the two statements CLS (clear the screen) and PRINT "HELLO" can be put on one line, as long as the individual statements are separated by colons, for example: CLS : PRINT "HELLO" You can put as many statements on a line as you like as long as the line has less than about 230 characters.
The argument for using ‘multiple statement lines’ is that it saves some memory space and may make the program work a little faster. But the argument against is that you will notice it becomes much more difficult to follow the program when you list it (see chapter 16).