Module 07 - Variables

Question 1

What are the three main actions that can take place in your code when you are defining your own variables?

Answer 1

1. Declaring a variable
2. Assigning a value to a variable
3. Using a variable

Question 2

What is passed-by-value?

Answer 2

When you pass a variable to a function, you’re passing a copy of its value, not the original variable itself.

Question 3

What are the common mistakes when working w/ functions?

Answer 3

• Forgetting to return a value
• Forgetting to assign the result
• Returning early unintentionally

Question 4

What is: x–;?

Answer 4

x - 1

Question 5

What is: x++;?

Answer 5

x + 1

Question 6

What is: x += 5;?

Answer 6

x= x + 5

Question 7

What is: x -= 8;?

Answer 7

-=

Question 8

What is: x *= 10;?

Answer 8

*=

Question 9

What is: x /= 4;?

Answer 9

/=

Question 10

What is toggle?

Answer 10

Means to switch back and forth between states

Question 11

What is round()?

Answer 11

Calculates the integer closest to a number.

For example, round(133.8) returns the value 134.

Question 12

What is dist()?

Answer 12

Calculates the distance 2 (x,y) coordinate positions on the canvas

Question 13

What is constrain()?

Answer 13

Guarantees a value between the range provided by the second and third arguments

Question 14

What is a return statement?

Answer 14

A return statement in a function will immediately return to the point at which the function was called

Question 15

Is this what a typical setup for a return function looks like?

function myFunction(…) {
let result;
// code that computes result
return result;
}

Answer 15

True