Turning pseudocode or a flowchart into JavaScript

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Quick Questions

Shade in the A or B circle for each question.

1. The pseudocode step is: SET score TO 0. Which JavaScript statement matches it?

A let score = 0;

B score == 0;

2. The pseudocode step is: ASK 'What is your name?' and store it in name. Which JavaScript matches?

A let name = console.log('What is your name?');

B let name = prompt('What is your name?');

3. In a flowchart, a diamond shape asks a yes/no question such as 'Is age >= 13?'. Which JavaScript does it become?

A if (age >= 13) { ... }

B let (age >= 13) { ... }

4. A flowchart has a parallelogram labelled 'OUTPUT total'. Which JavaScript matches?

A prompt(total);

B console.log(total);

5. A flowchart diamond 'Is count < 5?' has a Yes path that returns to the diamond after adding 1 to count. Which JavaScript shows this?

A while (count < 5) { count++; }

B if (count < 5) { count++; }

Match the Pairs

Draw a line connecting each item on the left to its match on the right.

Left column		Right column
1let age = prompt("Enter your age");		AThe pseudocode step ASK for name is an input, so it should use prompt(), not console.log(), which only displays output.
2while (lives > 0) {		Bif (score >= 10) {
3The pseudocode step SET total TO 0 becomes a variable declaration with let.		CTranslates a decision diamond with an arrow looping back: while lives is more than 0, repeat the steps inside.
4A decision diamond that asks 'Is score >= 10?' becomes an if statement with the same condition.		Dlet total = 0;
5if (score = 10) {		ETranslates a parallelogram input step: INPUT age. The answer from the user is stored in the variable age.
6let name = console.log("Enter your name");		FThe diamond asks 'Is score equal to 10?' but the code uses = which assigns a value. It should use === to compare.

Definitions

let score = 0;

Fill in the Blanks

Complete each line of code by filling in the missing parts.

// SET score TO 0 ___ score = 0;

// ASK "Your name?" let name = ______("Your name?");

__ (score > 10) { console.log("Well done!"); }

while (lives _ 0) { lives--; }

let total = 5 + 3; ___________(total);

Spot the Error

Shade in the letter of the line that contains an error.

Question 1

A let score == 0;

B score = score + 5;

C console.log(score);

Question 2

A let name = prompt("Name?");

B let age = prompt("Age?");

C print(name, age);

Question 3

A let mark = 72;

B if mark >= 50 {

C console.log("Pass");

D }

Question 4

A let city = ask("City?");

B console.log("Hi " + city);

C console.log(city.length);

Question 5

A let count = 1;

B repeat (count <= 3) {

C console.log(count);

D count++;

E }

Answer Key

Turning pseudocode or a flowchart into JavaScript

Section A: Quick Questions

A — let score = 0;

B — let name = prompt('What is your name?');

A — if (age >= 13) { ... }

B — console.log(total);

A — while (count < 5) { count++; }

Section B: Match the Pairs

let age = prompt("Enter your age"); → Translates a parallelogram input step: INPUT age. The answer from the user is stored in the variable age.

while (lives > 0) { → Translates a decision diamond with an arrow looping back: while lives is more than 0, repeat the steps inside.

The pseudocode step SET total TO 0 becomes a variable declaration with let. → let total = 0;

A decision diamond that asks 'Is score >= 10?' becomes an if statement with the same condition. → if (score >= 10) {

if (score = 10) { → The diamond asks 'Is score equal to 10?' but the code uses = which assigns a value. It should use === to compare.

let name = console.log("Enter your name"); → The pseudocode step ASK for name is an input, so it should use prompt(), not console.log(), which only displays output.

Section C: Definitions

let score = 0; — Translates the pseudocode step SET score TO 0. Each step of pseudocode or a flowchart becomes one JavaScript statement: ask is prompt, a decision diamond is if, a loop arrow is while.

Section D: Fill in the Blanks

// SET score TO 0
let score = 0;

// ASK "Your name?"
let name = prompt("Your name?");

if (score > 10) {
  console.log("Well done!");
}

while (lives > 0) {
  lives--;
}

let total = 5 + 3;
console.log(total);

Section E: Spot the Error

A — The pseudocode step SET score TO 0 is an assignment, so it needs a single = sign. The == symbol compares values and cannot be used to create a variable. It should be let score = 0;

C — A parallelogram or PRINT step that shows output becomes console.log() in JavaScript. There is no print() function here. It should be console.log(name, age);

B — A decision diamond becomes an if statement, and the condition must be inside round brackets. It should be if (mark >= 50) {

A — The pseudocode word ASK becomes prompt() in JavaScript. ask() is not a JavaScript function. It should be let city = prompt("City?");

B — A flowchart arrow that loops back while a condition is true becomes a while loop. repeat is not a JavaScript keyword. It should be while (count <= 3) {