How do you create an array in Rexx?
Creating Arrays Arrays are created with the same naming convention which is used for variables in Rexx. Arrayname − This is the name provided to the array. Index − This is the index position in the array to refer to a specific element. Value − This is the value assigned to the index element in the array.
How to use array in Rexx?
One way to code arrays in Rexx is to use so-called “stem variables” which use periods. In the above code “color” is the name of the array; however, there are three color names, so each one gets stored with a number as well. The number is called an index.
How to define an array?
An array is a container object that holds a fixed number of values of a single type. The length of an array is established when the array is created. After creation, its length is fixed. You have seen an example of arrays already, in the main method of the “Hello World!” application.
What is stem in Rexx?
Stems. z/OS TSO/E REXX Reference. SA32-0972-00. A stem is a symbol that contains just one period, which is the last character. It cannot start with a digit or a period.
Does REXX do until?
The do-until loop is a slight variation of the do while loop. This loop varies in the fact that is exits when the condition being evaluated is false.
What is REXX tool in mainframe?
Rexx (Restructured Extended Executor) is an interpreted programming language developed at IBM by Mike Cowlishaw. Proprietary and open source Rexx interpreters exist for a wide range of computing platforms; compilers exist for IBM mainframe computers.
Does Rexx do until?
What is parse In Rexx?
The parse function is used in Rexx to take a string value and then break them down into words. In the above example, the words are then split and then stored in the word variables. This time we are using a while clause to do the parsing.
How do you create an array?
The usual way of declaring an array is to simply line up the type name, followed by a variable name, followed by a size in brackets, as in this line of code: int Numbers[10]; This code declares an array of 10 integers. The first element gets index 0, and the final element gets index 9.
Do while loops Cobol?
Use a DO WHILE loop when you want to execute the loop while a condition is true. DO WHILE tests the condition at the top of the loop. If the condition is initially false, the loop is never executed. You can use a DO WHILE loop instead of the DO FOREVER loop in the example using the LEAVE Instruction.
How to set the value of an array in Rexx?
If you never use a simple variable anywhere that begins with a $, then you never need worry about REXX substituting anything but $JANUARY for $January (but again, you still need to be careful about case-sensitivity). You can easily set the value of all fields of an array just by assigning that value to the stem’s name.
How is the DO loop used in Rexx?
The do loop is used to iterate through the array elements. The variable number_of_elements is used to store the number of elements in the array. The variable j is used to iterate through each element of the array. It was also mentioned that we can construct multi-dimensional arrays in Rexx.
Which is the first subscript element in Rexx?
In Rexx, the first subscript is whatever you use! So, input the first array element into position 0 or 1 as you prefer. Let’s look at the different operations available for arrays. Arrays are created with the same naming convention which is used for variables in Rexx. The general syntax for creating arrays is as follows −
When to use a simple variable name in Rexx?
When you use a simple variable name (rather than a number) for a tail, then something called “tail name substitution” is performed. All this means is that REXX looks up the value of that simple variable, and uses its value for that part of the compound variable name. For example, let’s consider a compound variable named Days.MyDay.