Get Do Which? Loop, Until Or While? A Review Of Data Step And Macro ...

Two major types of loops are FOR LOOPS and WHILE LOOPS. A For loop will run a preset number of times whereas a While loop will run a variable number of times. For loops are used when you know how many times you want to run an algorithm before stopping. Loops, Types of Loops, and Loop Uses | by Sean Guthrie Medium https://medium.com › loops-types-of-loops-and-loop-... Medium https://medium.com › loops-types-of-loops-and-loop-...

There are two main types of loops, for loops and while loops. Programming - Loops utah.edu https://users.cs.utah.edu › ~germain › PPS › Topics › loops utah.edu https://users.cs.utah.edu › ~germain › PPS › Topics › loops

Loops are control structures used to repeat a given section of code a certain number of times or until a particular condition is met. Visual Basic has three main types of loops: for.. next loops, do loops and while loops. Visual Basic/Loops - Wikibooks, open books for an open world wikibooks.org https://en.wikibooks.org › wiki › Visual_Basic › Loops wikibooks.org https://en.wikibooks.org › wiki › Visual_Basic › Loops

To execute multiple statements conditionally, you use a DO group. Use a DO group in a DATA step when you want to execute multiple statements for a true IF-THEN expression. Only one executable statement is allowed in IF-THEN and ELSE statements.

The DO UNTIL statement evaluates the condition at the bottom of the loop; the DO WHILE statement evaluates the condition at the top of the loop. Note: The statements in a DO UNTIL loop always execute at least one time, whereas the statements in a DO WHILE loop do not iterate even once if the condition is false.

PHP supports following four loop types. for − loops through a block of code a specified number of times. while − loops through a block of code if and as long as a specified condition is true. do... ... foreach − loops through a block of code for each element in an array. PHP - Loop Types - Tutorialspoint tutorialspoint.com https://.tutorialspoint.com › php › php_loop_types tutorialspoint.com https://.tutorialspoint.com › php › php_loop_types

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.

There are two forms of conditional DO Loops, DO UNTIL loops and DO WHILE loops. DO UNTIL loops continue executing until the condition you have specified becomes true. DO WHILE loops continue executing while the condition you have specified remains true.