Do While statements REXX?
The while statement is executed by first evaluating the condition expression (a Boolean value), and if the result is true, then the statements in the while loop are executed. The process is repeated starting from the evaluation of the condition in the while statement.
What is the syntax of while statement?
The expression must have arithmetic or pointer type. Execution proceeds as follows: The expression is evaluated. If expression is initially false, the body of the while statement is never executed, and control passes from the while statement to the next statement in the program.
Does REXX have until syntax?
Syntax. The do-until statement is different from the do-while statement in the fact, that it will only execute the statements until the condition evaluated is true. If the condition is true, then the loop is exited.
What is do while syntax in 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.
Do forever loop in REXX?
Infinite loops are sections of code that keep repeating because the programmer doesn’t give them a reason to stop. If you actually intend for a loop to keep repeating indefinitely, you can use the FOREVER keyword to signify this. …
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.
What is the correct syntax for Do-While loop?
The syntax is: do { statements } while (condition); Here’s what it does. First, the statements are executed, then the condition is tested; if it is true , then the entire loop is executed again.
What do-while loops do?
The while loop is used to repeat a section of code an unknown number of times until a specific condition is met. For example, say we want to know how many times a given number can be divided by 2 before it is less than or equal to 1.
Do Until and do while loop?
A “Do While” loop statement runs while a logical expression is true. This means that as long as your expression stays true, your program will keep on running. Once the expression is false, your program stops running. A “Do Until” loop statement runs until a logical statement is true.
Do while loops IIB?
The WHILE statement repeats the steps specified in DO provided that condition is TRUE. It is your responsibility to ensure that the logic of the program is such that the loop terminates. If condition evaluates to UNKNOWN, the loop terminates immediately. If present, Label gives the statement a name.
What is do while equivalent in Cobol?
RE: Implementing Do-While in COBOL The COBOL equivalent to DO WHILE is PERFORM UNTIL NOT …
How does the do while statement in Rexx work?
The syntax of the do-while statement is as follows − The while statement is executed by first evaluating the condition expression (a Boolean value), and if the result is true, then the statements in the while loop are executed. The process is repeated starting from the evaluation of the condition in the while statement.
How do you end a loop in Rexx?
When the user enters a blank, the loop ends and so does the exec. To end the loop without ending the exec, use the LEAVE instruction, as described in the following topic. The LEAVE instruction causes an immediate exit from a repetitive loop. Control goes to the instruction following the END keyword of the loop.
How is do-until statement different from do-while statement?
The do-until statement is different from the do-while statement in the fact, that it will only execute the statements until the condition evaluated is true. If the condition is true, then the loop is exited.