| LOG | Function which gives the logarithm of a number to |
| base 10. | |
| LOMEM (LOM.) || | 0 Variable used to indicate the lowest free memory |
| location which can be used to store the value of | |
| variables used by the program. LOMEM can be reset | |
| by the user. | |
| MID$( (M.) | Extract a substring from a longer string. |
| MOD | Give the integer remainder after a division. |
| MODE (MO.) | Change the display mode. Mode cannot be changed |
| within a procedure or function. | |
| MOVE | Move the graphics cursor invisibly to the given |
| position. | |
| NEW | Remove the current program. It can be retrieved |
| using OLD. | |
| NEXT (N.) | Part of the FOR...NEXT loop indicating the end of |
| the statements which are to be repeatedly executed. | |
| NOT | Used as a logical or bitwise operator. |
| OFF | Part of the ON ERROR OFF statement which |
| switches error trapping off and enables the computer | |
| to again print its standard error messages and halt | |
| the program. | |
| OLD (0.) | Retrieve a program after a NEW or after BREAK |
| has been pressed. If typing OLD gives a 'Bad | |
| Program' message after the BREAK key has been | |
| pressed, the program has been corrupted and must | |
| be loaded again from disc. | |
| ON ERROR | Used to control the action taken by the computer if it |
| encounters an error in the program. | |
| ON.. .GOTO or | The value of the variable following ON is found. If its |
| ON.. .GOSUB | value is 1, the computer jumps to the first line |
| number in the list following the GOTO/GOSUB | |
| statement; if the value is 2, it jumps to the second | |
| line number, and so on- | |
| ON.. .PROC | Used to give a multi-branching facility and enable |
| one of a series of procedures to be executed. | |
| OPENIN (OP.) | Open a file for input only. |
| App 6.5 |