COMMANDUnder review

LOOP

LOOP (FOR ... NEXT / WHILE ... ENDDO)

Skips the remainder of a FOR or WHILE iteration.

LOOPAdvPL

01 · OVERVIEW

Overview

In FOR the counter advances normally; in WHILE the condition is reevaluated. Placing WHILE progress after LOOP can cause endless repetition. Unlike EXIT, LOOP does not terminate the loop. (Sources: refs. 1–1.)

02 · SYNTAX

Syntax

LOOP (FOR ... NEXT / WHILE ... ENDDO)

Return value

Flow control; no returned value.

03 · PRACTICAL EXAMPLE

Commented example

#Include "Protheus.ch"

User Function Ed512()
    Local nI
    For nI := 1 To 5
        // Skip only iteration number 3.
        If nI == 3
            Loop
        EndIf
        ConOut(cValToChar(nI))
    Next
Return Nil

Expected result

Displays 1, 2, 4 and 5. Under review: editorial example neither compiled nor run in Protheus. Check includes, release, RDD and context before testing.

BEST PRACTICES

Ensure required progress and cleanup occur before skipping an iteration.
Under review: editorial example neither compiled nor run in Protheus. Check includes, release, RDD and context before testing.

LOOP

Overview

Syntax

Return value

Commented example

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