Coding Grandmaster · project 34 of 46 · premium, free for now

Draw a bar chart

Draw one filled bar for each value, 40 wide and 15 times the value tall, 50 apart, starting at x = -150 along the line y = -100, using a different colour from the list for each.

Learn

A chart turns numbers into shapes you can compare at a glance. A bar chart is a row of rectangles whose heights are proportional to the values. With the turtle, each bar is four sides: across, up by the value times a scale, back across and down. Fill each bar with its own colour from a list.

Your task

Draw one filled bar for each value, 40 wide and 15 times the value tall, 50 apart, starting at x = -150 along the line y = -100, using a different colour from the list for each.

Stretch challenge

Add a label above each bar with t.write(value).

← Cleaning messy data Draw a line chart →

Python

Press Run to see what your program prints.

Keep going in Coding Grandmaster

Records, filters and rankings

Keep the students whose score is at least cutoff, sort them by highest score (ties by name), print how many qualified, and print the first top of them as a numbered list.

Start →32

Group by: totals per region

For every sale of at least minimum, add it to its region. Print one line per region (alphabetical) like east: total 360, average 180.0, orders 2.

Start →33

Cleaning messy data

Write fill_missing(values) that replaces each None with the mean of the other values rounded to 1 decimal place, and remove_duplicates(values) that keeps only the first of each repeated value in order. Print both results for the readings.

Start →35

Draw a line chart

Draw an x axis and a y axis from the origin at (-150, -100), then plot the sales as dots (50 apart across, 5 times the value up) joined by lines.

Start →36

Capstone: a report table

Write grade(score) (A for 80 or more, B for 70 or more, otherwise C) and print the ranking, highest first, as an aligned table with a header, then the average (2 decimal places) and the name of the top scorer.

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Practise the idea

🐢 Play Turtle Studio

Write movement commands and watch a turtle draw shapes on a canvas.

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FAQ

Draw a bar chart: common questions

I am stuck. What can I do?

Press Hint for a nudge, read the message next to each goal, and compare your code with the lesson text. If you still need it, Show answer reveals a model solution. Try to type it yourself rather than copy it.

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