For and While Loops in the Standard Language Guide

Loops let you execute a block of code repeatedly without duplicating it. Standard provides two loop constructs: the for loop for iterating over a sequence or a set number of steps, and the while loop for repeating code as long as a condition remains true. Both are concise to write and easy to read.

The For Loop

The for loop runs a block of code until it reaches the end of a given sequence. In Standard, that sequence can be a single integer — causing the block to execute that exact number of times — or an array of objects to iterate over. Use @ inside the loop body to reference the current working object. Print the loop index five times:

for: 5 {
    print @
}

Iterate through database results:

results [vhl]

#Print each vehicle in results
for: results {
    print @
}

The While Loop

The while loop runs a block of code repeatedly until the condition you provide evaluates to false. Make sure the condition can eventually become false to avoid an infinite loop.

i 0
while: i < 5 {
    i++
    print @
}

Always ensure the condition in a while loop will eventually evaluate to false. If the condition never changes, your program will loop indefinitely and become unresponsive.

Conditional Logic and Boolean Operators in Standard

Defining and Calling Functions in Standard Language

⌘I

​The For Loop

​The While Loop

The For Loop

The While Loop