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Control-flow structures

Combines sequence, decisions and loops with an explicit condition.

Control-flow structuresAdvPL

01 · OVERVIEW

Overview

Documentation groups sequence, conditional branching, repetition and multiple branching. Choose the structure for the rule: IF selects a path while FOR visits a known interval. This example sums only values above one, with movement controlled by FOR itself. Local variables avoid dependence on a global counter. No table access or transactional effects occur. (TOTVS, n.d., ref. 1)

03 · PRACTICAL EXAMPLE

Commented example

#Include "Protheus.ch"
User Function Ed367()
    Local nIndex
    Local nSum := 0
    // The condition selects values within the interval.
    For nIndex := 1 To 3
        If nIndex > 1
            nSum += nIndex
        EndIf
    Next nIndex
Return nSum

Expected result

Expected return: 5, the sum of 2 and 3. Under review: editorial example neither compiled nor run in Protheus. Check includes, release, RDD and context before testing.

BEST PRACTICES

Define start, condition and movement for every loop.
Under review: editorial example neither compiled nor run in Protheus. Check includes, release, RDD and context before testing.

Control-flow structures

Overview

Commented example

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