Keep the Zeros: a coding challenge

Hall tickets print the roll number exactly as it was given, zeros and all.

My Program

My Program

Tap a block to add it to your program, or drag it onto the canvas.

Talk

AskAsk the user for input

TellShow a message

Values

Create ValueCreate a variable

Change ValueUpdate a variable

Decide

DecisionMake a decision

ChooseOne of many paths

Repeat

RepeatRepeat N times

Repeat WhileRepeat while true

CountCount 1, 2, 3…

For EachEach item in a list

Lists

Change a ListAdd, change, remove

Data

Filter RowsKeep the rows that match

Sort RowsPut rows in order

Data structures

StackPush, pop: last in, first out

QueueJoin, leave: first in, first out

Functions

FunctionMake your own block

CallRun a function

ReturnFinish a function

Objects

ClassA template for objects

Change a FieldChange part of an object

Finish

EndFinish your program

Press enter or space to select a node. You can then use the arrow keys to move the node around. Press delete to remove it and escape to cancel.

Press enter or space to select an edge. You can then press delete to remove it or escape to cancel.

Your program's messages appear here when you press Run.