Texas Instruments TI-92 Owners Manual - Page 314

Using Loops to Repeat a Group of Commands To repeat the same group of commands successively, use a loop. Several types of loops are available. Each type gives you a different way to exit the loop, based on a conditional test. „ Control Toolbar Menu To enter most of the loop-related commands, use the Program Editor's „ Control toolbar menu. Note: A loop command marks the start of the loop. The corresponding End command marks the end of the loop. When you select a loop, the loop command and its corresponding End command are inserted at the cursor location. :For | :EndFor If the loop requires arguments, the cursor is positioned after the command. You can then begin entering the commands that will be executed in the loop. For...EndFor Loops Note: The ending value can be less than the beginning value, but the increment must be negative. A For...EndFor loop uses a counter to control the number of times the loop is repeated. The syntax of the For command is: For(variable, begin, end [, increment]) added to the counter each subsequent time For is executed (If this optional value is omitted, the increment is 1.) exits the loop when variable exceeds this value counter value used the first time For is executed variable used as a counter When For is executed, the variable value is compared to the end value. If variable does not exceed end, the loop is executed; otherwise, program control jumps to the command following EndFor. Note: The For command automatically increments the counter variable so that the program can exit the loop after a certain number of repetitions. i > 5 i  5 :For i,0,5,1 EndFor :-------- At the end of the loop (EndFor), program control jumps back to the For command, where variable is incremented and compared to end. Chapter 17: Programming 297