Programming technique

Sequence and output

A program normally executes statements from top to bottom. Changing the order can change the result, even when every individual statement is valid.

Output one line at a time

System.out.println() displays a value and then moves to a new line. The statements below produce three lines in exactly the order written.

print() displays a value and then moves to a new line. The statements below produce three lines in exactly the order written.

System ready
Temperature: 21 C
Doors locked

Continue on the same line

System.out.print() does not move to a new line. It is useful when several statements contribute to one line of output.

By default, print() ends with a newline. Set end="" when several statements should contribute to the same line.

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Comments

Java uses // for a single-line comment. A useful comment explains a purpose, decision or section of the program. Avoid comments that merely repeat obvious syntax.

Python uses # for a single-line comment. A useful comment explains a purpose, decision or section of the program. Avoid comments that merely repeat obvious syntax.

Challenges Choose one

Choose a challenge that feels appropriate for you. Code heat is only a rough estimate, not a fixed level.

Visual Dice

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Challenge ID: PC-T01-C01 · Standards: B2.3.1

Write a program that outputs a large number 5 as the face of a die. Use only text characters and make the border and spots line up clearly.

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ASCII Name

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Challenge ID: PC-T01-C02 · Standards: B2.3.1

Write a program that outputs your name as ASCII art. Plan the final picture first, then reproduce it using a sequence of print statements.

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Console Profile Card

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Challenge ID: PC-T01-C03 · Standards: B2.3.1

Create a neatly aligned console profile card containing a name, favourite subject, current project and one-line motto. Include a border and purposeful comments that explain sections rather than obvious individual lines.

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Console Poster

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Challenge ID: PC-T01-C04 · Standards: B2.3.1

Design a detailed console poster for an event, game or club. It must use at least 15 output statements, preserve exact spacing and order, and include a short test checklist describing what the finished output should look like.

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This choice is shared with the portfolio setup page.

1

Create your challenge folder

Run this command before starting. It creates the correct empty folder inside your portfolio.

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2

Complete the challenge

Write and test your own solution in the folder created above.

3

Submit for review

Run this when your program is complete. It creates the README, commits the folder and pushes it.

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