Course Content
Introduction to JavaScript
4. Conditional Statements
Introduction to JavaScript
Summary
You have completed all the chapters! This is fantastic! Review what you have learned throughout the course and take a quiz.
Variables and Constants
- Variable (
let
) is named storage of value for the multiple usages. - Constant (
const
) is an unchangeable variable.
Data Types
- number is a numeric data type.
- string is a text data type. Writing in quotes (
"
or'
). - boolean is a logical data type (
true
orfalse
). - array is a collection of values. The most commonly used methods are
push()
,pop()
,unshift()
andshift()
.
Basic operations
- Assignment (
=
). - Math (
+
,-
,*
, etc.). - Comparison (
>=
,<
,==
,===
, etc.). - Logical (AND
&&
, OR (||
). - String Concatenation (
+
between strings).
Conditional Statements
if (condition) {code block}
else {code block}
afterif
.else if (condition) {code block}
for a few conditions.
Loops
while (condition) {code block}
.do (code block) while (condition)
.for (let counter; condition; counter++) {code block}
.
Functions
function myFunc(arg1, arg2, arg3) {code block}
- Call the function:
myFunc(value1, value2, value3)
- Use the
return
keyword to return the value from a function.
1. Conditional Statements are used to:
2. Loops are used to:
3. Functions are used to:
Conditional Statements are used to:
Select a few correct answers
Loops are used to:
Select the correct answer
Functions are used to:
Select a few correct answers
Everything was clear?
Section 6. Chapter 7