Function execution flow in Javascript - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to call the function greet.

Javascript

function greet() {
  console.log('Hello!');
}

greet[1];

Drag options to blanks, or click blank then click option'

A[]

B{}

C()

D;

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting the parentheses and just writing the function name.

Using curly braces or square brackets instead of parentheses.

To execute a function in JavaScript, you add parentheses after its name, like greet().

2fill in blank

medium

Complete the code to return the sum of two numbers inside the function.

Javascript

function add(a, b) {
  return a [1] b;
}

Drag options to blanks, or click blank then click option'

A/

B-

C*

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using subtraction - instead of addition.

Using multiplication or division operators by mistake.

The plus sign + adds two numbers together in JavaScript.

3fill in blank

hard

Fix the error in the function call to correctly pass the argument.

Javascript

function sayName(name) {
  console.log('Name:', name);
}

sayName[1];

Drag options to blanks, or click blank then click option'

A'John'

B('John')

C(John)

DJohn

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the string without quotes, causing a reference error.

Not using parentheses to call the function.

When calling a function with a string argument, you must put the string in quotes inside parentheses, like sayName('John').

4fill in blank

hard

Fill both blanks to create a function that returns the square of a number.

Javascript

function square(num) {
  return num [1] [2];
}

Drag options to blanks, or click blank then click option'

A**

B*

C2

Dnum

Attempts:

3 left

💡 Hint

Common Mistakes

Using multiplication * but forgetting to multiply by the number itself.

Using the wrong operator or missing the exponent.

The exponentiation operator ** raises a number to a power. To square a number, use num ** 2.

5fill in blank

hard

Fill the blanks to create a function that filters numbers greater than 10 from an array.

Javascript

function filterGreater(arr) {
  return arr.filter(num => num [1] [2]);
}

Drag options to blanks, or click blank then click option'

A>

B10

C==

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using equality == instead of greater than.

Using less than < instead of greater than.

To filter numbers greater than 10, use the greater than operator > and compare with 10: num > 10.