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83Plus:Basic:Repeat

2007-02-23T19:25:19Z

Catsleepsunderoakleaves:

[[Category:83Plus:Basic:Conditionals|Repeat]]

The '''Repeat''' loop is a program-flow statement that repeats the execution a section of code at least once, based on the value of a condition. The Repeat loop is comprised of a <code>Repeat(</code> token, a conditional statement, and a block of code terminated by an <code>End</code> token. It is similar to, but fundamentally different than, the [[83Plus:Basic:While|While]] loop.

== Synopsis ==
'''Token Size:''' 1 byte

'''Syntax:'''
<nowiki>
:Repeat </nowiki>''condition''<nowiki>
: </nowiki>''code to be executed''<nowiki>
:End
</nowiki>

== Synatax ==
The Repeat loop consists of at least three lines of code; the initialization and condition of the loop:

<nowiki>
:Repeat(</nowiki>'' condition ''<nowiki>)</nowiki>

the body of the loop, possibly consisting of several lines, and a terminating <code>End</code> statement.

This loop pushes its return condition onto the stack, so it should ideally exclude <code>Goto</code> statements, or a memory error is possible.

== Execution ==
When the <code>Repeat(</code> command is encountered, execution of the code block begins. At the end of the loop, the condition is evaluated. If it is false, the loop repeats; if it is true, the loop exits. Becuase continuation of the loop is dependant on the ''opposite'' boolean value of that which controls the While loop, the repeat loop is often used incorrectly.

== Use ==
The Repeat loop can be generally used as an alternative to thw While loop. In general, a repeat should be used for a loop that should always run at least once. The exact choice is dependant on the needs of the programmer.

The following are essentially identical:

<nowiki>
:Repeat(Z=105)
: </nowiki>''...''<nowiki>
:getKey\->\Z
:End
...comapre to...
:0\->\Z
:While(Zâ‰ 105)
: </nowiki>''...''<nowiki>
:getKey\->\Z
:End
</nowiki>

The Repeat loop is smaller than the While by three bytes. A similar program using the <code>Ans</code> variable makes the While loop larger by one byte. Either way, the Repeat loop is generally smaller.

83Plus:Basic:Repeat

2007-02-23T19:24:22Z

Catsleepsunderoakleaves:

[[Category:83Plus:Basic:Conditionals|Repeat]]

The '''Repeat''' loop is a program-flow statement that repeats the execution a section of code at least once, based on the value of a condition. The Repeat loop is comprised of a <code>Repeat(</code> token, a conditional statement, and a block of code terminated by an <code>End</code> token. It is similar to, but fundamentally different than, the [[While]] loop.

== Synopsis ==
'''Token Size:''' 1 byte

'''Syntax:'''
<nowiki>
:Repeat </nowiki>''condition''<nowiki>
: </nowiki>''code to be executed''<nowiki>
:End
</nowiki>

== Synatax ==
The Repeat loop consists of at least three lines of code; the initialization and condition of the loop:

<nowiki>
:Repeat(</nowiki>'' condition ''<nowiki>)</nowiki>

the body of the loop, possibly consisting of several lines, and a terminating <code>End</code> statement.

This loop pushes its return condition onto the stack, so it should ideally exclude <code>Goto</code> statements, or a memory error is possible.

== Execution ==
When the <code>Repeat(</code> command is encountered, execution of the code block begins. At the end of the loop, the condition is evaluated. If it is false, the loop repeats; if it is true, the loop exits. Becuase continuation of the loop is dependant on the ''opposite'' boolean value of that which controls the While loop, the repeat loop is often used incorrectly.

== Use ==
The Repeat loop can be generally used as an alternative to thw While loop. In general, a repeat should be used for a loop that should always run at least once. The exact choice is dependant on the needs of the programmer.

The following are essentially identical:

<nowiki>
:Repeat(Z=105)
: </nowiki>''...''<nowiki>
:getKey\->\Z
:End
...comapre to...
:0\->\Z
:While(Zâ‰ 105)
: </nowiki>''...''<nowiki>
:getKey\->\Z
:End
</nowiki>

The Repeat loop is smaller than the While by three bytes. A similar program using the <code>Ans</code> variable makes the While loop larger by one byte. Either way, the Repeat loop is generally smaller.