if ... then ... else ... do ... end do i = 1 to n ... end [and similar do loops] select when ... then ... ...etc. otherwise ... end信号语句的一般语法如下所示 −语法signal labelName signal [ VALUE ] labelExpression 让我们看一个如何使用信号语句的示例。
if rc = 0 then say 'The command executed successfully' else say 'The command failed, The error code is =' rc 当我们运行上述程序时,我们将得到以下结果。 输出(Output) The command failed, The error code is = 127 Redirection Commands Rexx还具有使用重定向命令的功能。 Rexx中提供了以下重定向命令。
作为一个简单的例子,您也可以像下面这样来编写 if 语句,而结果是一样的: if pos(INVOICE OVERDUE, input_line) 0 then say Found it! Here’s where: input_line else say Not found in this line: input_line 就格式而言,Rexx 是编程语言中最为宽松的。而且,它不是大小写敏感的。它的指令、函数和变量...
an entry or variable name. The same principle applies to Rexx; using, e.g., DO, ELSE, END, EXIT, IF, ITERATE, OTHERWISE, PROCEDURE, THEN, WHEN, as a variable name can make the code hard to read. -- Shmuel (Seymour J.) Metzhttp://mason.gmu.edu/~smetz3עַם יִש...
IF POS("INVOICE OVERDUE", Input_Line) > 0 THEN SAY "Found it! Here’s where:" Input_Line ELSE SAY "Not found in this line:" Input_Line Rexx为什么强大 除了它的易用性外,Rexx的基本设计使得它成为一种强大的语言。如图1所示,Rexx有大约20条指令作为一个小小的核心。这个核心周围有大约70个内置...
REXX provides a conventional selection of control constructs that include IF-THEN-ELSE,SELECT-WHEN- OTHERWISE-END, and several varieties of DO-END for grouping and repetition. These constructs are similar to those of PL/I, but with several enhancements and simplifications. The DO looping construct...
You should have read the z/VM: REXX/VM User's Guide to learn how to program in REXX. If you are new to REXX and to programming in general, read the z/VM: REXX/VM User's Guide. Syntax, Message, and Response Conventions The following topics provide information on the conventions used...
7 +++ PULL who /* Get the person's name.IF who = '' THEN SAY 'Hello stranger'ELSE SAY 'Hello' who IRX0006I Error running REXX.EXEC(HELLO), line 7: Unmatched "/*" or quote *** The exec runs until it detects the error, a missing */ at the end of the comment. As a ...
SyntaxxmlParseXML(filename) ParametersFilename − This is the name of the XML file which needs to be parsed.Return ValueThe document tree is returned by the function. Else returns 0, if there is an error.Examplercc = rxfuncadd('XMLLoadFuncs', 'rexxxml', 'xmlloadfuncs') if rcc ...
7 +++ PULL who /* Get the person's name.IF who = '' THEN SAY 'Hello stranger'ELSE SAY 'Hello' who IRX0006I Error running REXX.EXEC(HELLO), line 7: Unmatched "/*" or quote *** The exec runs until it detects the error, a missing */ at the end of the comment. As a ...