JavaScript Syntax and Type Conversion Quiz

Study Notes

Parameters and Data Types

A parameter is a piece of data or an object that describes the characteristics of an object.
Type refers to the type of variable, such as integer, string, floating point, or Boolean.
Data types in JavaScript include:
- Character: any single character or symbol, such as 'x', '@', or 'y'.
- String: a series or combination of characters, like "somevariable" or "64kgold".
- Integer: a number of the set Z = {..., -2, -1, 0, 1, 2,...}.
- Float (or double): any decimal number, like 97.1 or -97.1.
- Boolean: truth values, which can be either TRUE or FALSE.
- Function: a set of instructions or arguments.
- Object: items that exist in the browser that can be manipulated.
- Array: a type of object that contains a set of values mapped into keys.
- Undefined: a variable that has not been given a value yet.
- Null: a variable that has been defined but has been assigned the value of null.

Syntax Guides

Syntax refers to a set of rules that determines how a specific language will be written and interpreted by the browser.
JavaScript is case-sensitive.
JavaScript is processed from top to bottom.
The syntax for manipulating an object using a method or property is Object.Method() or Object.Property().
Quotes are used to tell the browser what is to be displayed exactly as it is written in the script.
Quotes can be single quotes (ʻ) or double quotes (“).
Comments can be added using “// “ for a single line of comment or by enclosing multiple-line comments between “/* */”.
The + symbol is used to concatenate a string.
Statements may contain a semicolon at the end, but it is not necessary in JavaScript unless there are multiple statements in one line.

Variables and Naming Rules

In JavaScript, variables are containers that contain a value, which can change as required.
Variables can contain alphanumeric values and the underscore character.
There should be no spaces in between characters.
Variables should not have punctuation characters.
Variables should start with a letter or underscore character.
Variable names are case-sensitive.

Operators

An operator is something that takes one or more values to yield another value, making the construct itself an expression.
An expression is “anything that has a value.”
Assignment operators are used to both assign and perform math operations.
Comparison operators are used to compare two values.
Logical operators are used to make decisions based on one or more truth values (True or False).
String operators are used to perform simple operations on a string or a piece of text.

Description

Test your knowledge on JavaScript syntax rules, type conversion, and object manipulation using methods and properties. Topics include parameters, data types, and syntax guides for writing and interpreting JavaScript code.