Your first line: practice
Main concept: printing, output, strings
3 minutes estimated · Runs here
Requires the earlier idea: Your first line
Level: apply a familiar concept to a changed requirement.
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53 available activities. Check the earlier idea before choosing an unfamiliar topic.
Main concept: printing, output, strings
3 minutes estimated · Runs here
Requires the earlier idea: Your first line
Level: apply a familiar concept to a changed requirement.
Main concept: strings, printing
3 minutes estimated · Runs here
Requires the earlier idea: Make it your message
Level: apply a familiar concept to a changed requirement.
Main concept: execution-order, printing
3 minutes estimated · Runs here
Requires the earlier idea: Two lines of output
Level: apply a familiar concept to a changed requirement.
Main concept: debugging
3 minutes estimated · Runs here
Requires the earlier idea: Close the message
Level: apply a familiar concept to a changed requirement.
Main concept: numbers, printing
3 minutes estimated · Runs here
Requires the earlier idea: Print a number
Level: apply a familiar concept to a changed requirement.
Main concept: strings, numbers
3 minutes estimated · Runs here
Requires the earlier idea: Digits can be text
Level: apply a familiar concept to a changed requirement.
Main concept: addition, numbers
3 minutes estimated · Runs here
Requires the earlier idea: Let code do the addition
Level: apply a familiar concept to a changed requirement.
Main concept: addition
5 minutes estimated · Runs here
Requires the earlier idea: Calculate a score total
Level: apply a familiar concept to a changed requirement.
Main concept: execution-order
3 minutes estimated · Runs here
Requires the earlier idea: Put the announcement in order
Level: apply a familiar concept to a changed requirement.
Main concept: printing, execution-order, addition
5 minutes estimated · Runs here
Requires the earlier idea: Announce the next round
Level: apply a familiar concept to a changed requirement.
Main concept: local-variables, variable-reading, assignment
3 minutes estimated · Runs here
Requires the earlier idea: Keep track of a value
Level: apply a familiar concept to a changed requirement.
Main concept: local-variables, variable-reading
3 minutes estimated · Runs here
Requires the earlier idea: Change the starting value
Level: apply a familiar concept to a changed requirement.
Main concept: variable-reading, strings
3 minutes estimated · Runs here
Requires the earlier idea: A name versus its value
Level: apply a familiar concept to a changed requirement.
Main concept: assignment, state-updates
3 minutes estimated · Runs here
Requires the earlier idea: See a stored value change
Level: apply a familiar concept to a changed requirement.
Main concept: assignment, state-updates
3 minutes estimated · Runs here
Requires the earlier idea: Change a stored value
Level: apply a familiar concept to a changed requirement.
Main concept: execution-order, state-updates
3 minutes estimated · Runs here
Requires the earlier idea: Show before and after
Level: apply a familiar concept to a changed requirement.
Main concept: variable-reading, debugging
3 minutes estimated · Runs here
Requires the earlier idea: Repair one clear mistake
Level: apply a familiar concept to a changed requirement.
Main concept: local-variables, state-updates, execution-order
5 minutes estimated · Runs here
Requires the earlier idea: Build a small score update
Level: apply a familiar concept to a changed requirement.
Main concept: booleans
4 minutes estimated · Runs here
Requires the earlier idea: Yes or no values
Level: apply a familiar concept to a changed requirement.
Main concept: comparison, boundaries
8 minutes estimated · Runs here
Requires the earlier idea: Compare a number with a boundary
Level: apply a familiar concept to a changed requirement.
Main concept: if-else
4 minutes estimated · Runs here
Requires the earlier idea: Choose between two messages
Level: apply a familiar concept to a changed requirement.
Main concept: if-elseif-else
9 minutes estimated · Runs here
Requires the earlier idea: Choose the right entry message
Level: apply a familiar concept to a changed requirement.
Main concept: functions
4 minutes estimated · Runs here
Requires the earlier idea: Run the same instructions again
Level: apply a familiar concept to a changed requirement.
Main concept: return-values
4 minutes estimated · Runs here
Requires the earlier idea: Give a value back to a caller
Level: apply a familiar concept to a changed requirement.
Main concept: parameters
3 minutes estimated · Runs here
Requires the earlier idea: Give a function one input
Level: apply a familiar concept to a changed requirement.
Main concept: functions, parameters
9 minutes estimated · Runs here
Requires the earlier idea: Calculate rewards from inputs
Level: apply a familiar concept to a changed requirement.
Main concept: return-values, early-return
9 minutes estimated · Runs here
Requires the earlier idea: Return a usable price
Level: apply a familiar concept to a changed requirement.
Main concept: or
3 minutes estimated · Runs here
Requires the earlier idea: Allow either condition
Level: apply a familiar concept to a changed requirement.
Main concept: and
3 minutes estimated · Runs here
Requires the earlier idea: Require both conditions
Level: apply a familiar concept to a changed requirement.
Main concept: not
3 minutes estimated · Runs here
Requires the earlier idea: Reverse a yes or no value
Level: apply a familiar concept to a changed requirement.
Main concept: or, and, not, boundaries
11 minutes estimated · Runs here
Requires the earlier idea: Open the supply gate
Level: apply a familiar concept to a changed requirement.
Main concept: truthiness, nil, defaults
9 minutes estimated · Runs here
Requires the earlier idea: Keep deliberate false settings
Level: apply a familiar concept to a changed requirement.
Main concept: composition, reuse
10 minutes estimated · Runs here
Requires the earlier idea: Reuse one price rule
Level: apply a familiar concept to a changed requirement.
Main concept: numbers, strings, concatenation
7 minutes estimated · Runs here
Requires the earlier idea: Join a value into a label
Level: apply a familiar concept to a changed requirement.
Main concept: tables, arrays, indexing
3 minutes estimated · Runs here
Requires the earlier idea: Keep several values together
Level: apply a familiar concept to a changed requirement.
Main concept: dictionaries
3 minutes estimated · Runs here
Requires the earlier idea: Read a named table entry
Level: apply a familiar concept to a changed requirement.
Main concept: table-updates
3 minutes estimated · Runs here
Requires the earlier idea: Update one inventory entry
Level: apply a familiar concept to a changed requirement.
Main concept: nil
3 minutes estimated · Runs here
Requires the earlier idea: A missing entry has no value
Level: apply a familiar concept to a changed requirement.
Main concept: tables, arrays, indexing
9 minutes estimated · Runs here
Requires the earlier idea: Read the inventory slots
Level: apply a familiar concept to a changed requirement.
Main concept: dictionaries, field-access
9 minutes estimated · Runs here
Requires the earlier idea: Describe an item with named fields
Level: apply a familiar concept to a changed requirement.
Main concept: scope, locals
10 minutes estimated · Runs here
Requires the earlier idea: Keep calculations in their own scope
Level: apply a familiar concept to a changed requirement.
Main concept: table-insert, table-remove, updates
11 minutes estimated · Runs here
Requires the earlier idea: Add and remove inventory items
Level: apply a familiar concept to a changed requirement.
Main concept: table-identity, references, nested-tables
12 minutes estimated · Runs here
Requires the earlier idea: Copy a nested loadout safely
Level: apply a familiar concept to a changed requirement.
Main concept: numeric-for
3 minutes estimated · Runs here
Requires the earlier idea: Repeat a known instruction
Level: apply a familiar concept to a changed requirement.
Main concept: numeric-for, accumulators
10 minutes estimated · Runs here
Requires the earlier idea: Build a numbered objective list
Level: apply a familiar concept to a changed requirement.
Main concept: iteration, ipairs, pairs
10 minutes estimated · Runs here
Requires the earlier idea: Total the inventory quantities
Level: apply a familiar concept to a changed requirement.
Main concept: while, repeat, termination
11 minutes estimated · Runs here
Requires the earlier idea: Charge a lamp without getting stuck
Level: apply a familiar concept to a changed requirement.
Main concept: loops-and-conditions, filtering
11 minutes estimated · Runs here
Requires the earlier idea: Choose unfinished objectives
Level: apply a familiar concept to a changed requirement.
Main concept: errors, tracing
10 minutes estimated · Runs here
Requires the earlier idea: Read the first useful error
Level: apply a familiar concept to a changed requirement.
Main concept: logic-errors, test-design
11 minutes estimated · Runs here
Requires the earlier idea: Find a test that exposes the defect
Level: apply a familiar concept to a changed requirement.
Main concept: booleans, nil, types
8 minutes estimated · Runs here
Requires the earlier idea: Tell false from missing
Level: apply a familiar concept to a changed requirement.
Main concept: missing-data, guards, validation
12 minutes estimated · Runs here
Requires the earlier idea: Repair an incomplete quest tracker
Level: apply a familiar concept to a changed requirement.
Main concept: types, refinement
12 minutes estimated · Runs here
Requires the earlier idea: Describe and refine typed data
Level: apply a familiar concept to a changed requirement.