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Chipmunk basic if commands6/17/2023 ![]() ![]() This situation does not seem to be improving. Unfortunately, due to ridiculous historical circumstances,Ĭomputers have been made a mystery to most of the world. Fascinating time capsule, political tract about use of computers to control you (CYBERCRUD as he puts it).Īny nitwit can understand computers, and many do. The first personal computer book (before the Altair came out!), though the PCC Newsletters predates it (and he mentions them). Read it from either end, there’s two coherent books written back-on-back like an Ace Double, happily you don’t have to turn your monitor upside down. Computer Lib/Dream Machines, by Ted Nelson. ![]() Where there is a choice of which to use it is mainly a matter of personal preference and favoured programming style.Īn 'else' command can be added to an 'if' and 'elseif' command sequence which will be executed if no previous 'if condition then' or 'elseif conditon then' has evaluated as true.Someone has finally uploaded a (possibly legal?) copy of to archive: The select case command may be used in preference to nested 'if' commands or sequences of 'if' and 'elseif' commands to make code execution clearer or the source code more readable, particularly that with 'select case', if the same variable is being tested repeatedly, the variable only needs to be specified once. If the first condition is true the code between the 'if condition then' and 'elseif condition then' command will be executed, otherwise the 'elseif' condition will be evaluated, and, if true, the code between 'elseif condition then' and 'end if' will be executed.Īdditional 'elseif' commands can be added and each will be evaluated in turn if no previous 'if condition then' or 'elseif conditon then' have not evaluated as true. Instead of an 'else' command it is possible to use an 'elseif' command and specify another condition. If the condition is false then program execution immediately continues after the 'end if' command. If the condition is true then the code between the 'if condition then' and 'end if' commands is executed and then program execution continues after the 'end if' command. After either sets of code are executed program execution will continue on the line after the 'end if'.Ī multi-line or block-structured 'if' command does not need to have an 'else' clause. When the condition evaluates as true the code between the 'if condition then' and 'else' commands is executed, otherwise the code between the 'else' and 'end if' command is executed. If the condition is true the current loop ( do.loop or for.next) is is prematurely ended, execution of the program will continue after the 'loop' or 'next' command.Ī multi-line or block-structured 'if' command is spread over multiple lines. If the condition is true, the program executes a gosub command to the label, jumping to the label, running until it comes to a return command, and then returning to the code after the 'if condition then gosub label' command. ![]() If the condition is true, the program flow jumps to the label specified and continues execution from there. This behaves in the same way as the 'if condition then label' command. IF pinC.0 = 1 OR b1 = 1 OR b2 = 3 THEN EXIT The left variable's value is compared with the right variable's value to determine if the condition is met. The variable's value is compared with the value to determine if the condition is met. The condition determine whether an action should be taken or not. The 'if' statement commands check the variable's values and inputs at the time the command is processed so it is normal to put the command within a program loop that regularly scans the input. If not the command is ignored and program flow continues on the next line after the 'if' command. If the condition is met the associated command is executed. This is commonly known as having 'nested if statements'.Īn 'if' statment is used to test general variables (or input pins) for certain conditions. These command statements may include further single line and multi-line 'if' commands. Home > BASIC Commands > Program Flow Control > if >Ĭondition - The condition which will cause the associated command to be executed or not.Ĭondition - The condition which will cause the associated code commands to be executed or not.Ĭode - Command statements which will be executed dependant upon the evaluation of the condition. ![]()
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