Texas Instruments TI-92 Owners Manual - Page 316

Loop...EndLoop Loops Note: The Exit command exits from the current loop. A Loop...EndLoop creates an infinite loop, which is repeated endlessly. The Loop command does not have any arguments. :Loop EndLoop :-------- Typically, the loop contains commands that let the program exit from the loop. Commonly used commands are: If, Exit, Goto, and Lbl (label). For example: An If command checks the condition. Exits the loop and jumps to here when x increments to 6. :0! x :Loop : Disp x : x+1! x : If x>5 : Exit :EndLoop :Disp x In this example, the If command can be anywhere in the loop. When the If command is: At the beginning of the loop At the end of the loop The loop is: Executed only if the condition is true. Executed at least once and repeated only if the condition is true. The If command could also use a Goto command to transfer program control to a specified Lbl (label) command. Repeating a Loop Immediately The Cycle command immediately transfers program control to the next iteration of a loop (before the current iteration is complete). This command works with For...EndFor, While...EndWhile, and Loop...EndLoop. Lbl and Goto Loops Although the Lbl (label) and Goto commands are not strictly loop commands, they can be used to create an infinite loop. For example: :Lbl START Goto START :-------- As with Loop...EndLoop, the loop should contain commands that let the program exit from the loop. Chapter 17: Programming 299