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HELP IFSTMT                                 Revised: Fran Evelyn, July 1985

IF STATEMENTS

When an IF statement is executed, the condition (which follows *IF) is
first evaluated, and if the result is TRUE then the action (the part
which follows *THEN) is also executed. What action to take if the
condition is not true is determined by other clauses that can be
inserted into the statement preceded by *ELSEIF or *ELSE. An IF
statement thus takes the form:

    if <condition>
        then <action>
    elseif <condition>
        then <action>
    <any number of additional ELSEIF...THEN.... clauses>
    else
        <action>
    endif

See also:
HELP *IF - for a more detailed summary of IF statement usage.
HELP *CONDITIONALS - for an overview of conditionals in POP-11
HELP *SWITCHON - a construct for abbreviating multi branch conditionals.

See also:
REF * SYNTAX,  REF * POPSYNTAX