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    Specifies the if part of an if statement.

    The principle calling structure of an if statement is:

    if expression

    statement, ... , statement

    elseif expression

    statement, ... , statement

    else

    statement, ... , statement

    end

    The elseif and else cases are optional.

    Syntax

    if
    b = 10
    if b == 1
      c = 3
    else
      c = 4
    end