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The repeat statement repetitively executes a block of one or more statements through an until statement and continues repeating unless the condition is false. The main difference between the two is the while loop may execute zero times if the condition is initially false, the repeat-until loop always executes at least once.
Zero-overhead looping is a feature of some processor instruction sets whose hardware can repeat the body of a loop automatically, rather than requiring software instructions which take up cycles (and therefore time) to do so. [1] [2] Zero-overhead loops are common in digital signal processors and some CISC instruction sets.
Infinite loop – Known as the repeat forever { ... } loop. Topics referred to by the same term This disambiguation page lists articles associated with the title Repeat loop .
Executing a set of statements zero or more times, until some condition is met (i.e., loop - the same as conditional branch) Executing a set of distant statements, after which the flow of control usually returns (subroutines, coroutines, and continuations) Stopping the program, preventing any further execution (unconditional halt)
This repeats until the condition becomes false. Do while loops check the condition after the block of code is executed. This control structure can be known as a post-test loop. This means the do-while loop is an exit-condition loop. However a while loop will test the condition before the code within the block is executed.
A conditional loop has the potential to become an infinite loop when nothing in the loop's body can affect the outcome of the loop's conditional statement. However, infinite loops can sometimes be used purposely, often with an exit from the loop built into the loop implementation for every computer language , but many share the same basic ...
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If in the 'addition' program above the second loop decrements x 0 instead of incrementing, the program computes the difference (cut off at 0) of the variables and . x 0 := x 1 LOOP x 2 DO x 0 := x 0 ∸ 1 END. Like before we can extend the LOOP syntax with the statement: x 0 := x 1 ∸ x 2