Basic JavaScript Instructions

Question 1

textContent vs. innerHTML

Answer 1

textContent outputs text/plain while innerHTML outputs text/html

Question 2

Statement

Answer 2

A statement is an individual instruction that the computer should follow. Each one should start on a new line and end with a semicolon.

The semicolon also tells the JavaScript interpreter when a step is over, indicating that it should move to the next step.

Question 4

Code Block

Answer 4

Some statements are surrounded by curly braces; these are known as code blocks. The closing curly brace is not follow by a semicolon.

Question 6

Variable

var quantity = 3;

Data Types

Answer 6

A temporary storage of information

keyword, name, assignment operator, value;

numbers, strings, booleans

Question 8

Array

Literal vs. Constructor

Answer 8

An array is a special type of variable that stores a list or a set of values that are related to each other.

var colors = [“white”, “black”, “custom”];

var colors = new Array(“white”, “black”, “custom”);

Question 10

Expression

Answer 10

An expression evaluates into (results in) a single value.

Question 12

Operators

Types

Answer 12

Expressions rely on things called operators; they allow programmers to create a single value from one or more values.

assignment

• color = “beige”;

arithmetic

• area = 3 * 2;

string

• greeting = “Hi “ + “Molly”;

comparison

• buy = 3 > 5;

logical

• buy = (5 > 3) && (2 < 4);