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Functions: Functions are blocks of code that perform a specific task. To create a function, use the "function" keyword, followed by the function name, and then the code that should be executed when the function is called.
Comments: Comments are used to add notes to your code. They are ignored by the computer, but can be helpful for other developers who are reading your code. To add a comment, use the "//" symbol.
Strings: Strings are used to represent text. They are enclosed in quotation marks.
Numbers: Numbers are used to represent numeric values. They can be integers or decimals.
Booleans: Booleans are used to represent true or false values.
Arrays: Arrays are used to store collections of data. They are enclosed in square brackets, and each item in the array is separated by a comma.
Objects: Objects are used to store collections of key-value pairs. They are enclosed in curly braces, and each key-value pair is separated by a comma.
Parameters: Parameters are used to pass data into a function. They are specified in the function definition, and are separated by commas.
Return Values: Functions can return a value, which can be used in other parts of your code. To return a value, use the "return" keyword, followed by the value.
Scope: Scope refers to the visibility of variables and functions in your code. Variables and functions that are defined inside a function are only visible within that function.
Callbacks: Callbacks are functions that are passed as arguments to other functions. They are commonly used in asynchronous programming.
Control flow refers to the order in which statements are executed in your code. Here are some of the key concepts related to control flow:
Conditional Statements: Conditional statements are used to execute different code depending on a certain condition. The most common conditional statement is the "if" statement.
Loops: Loops are used to execute the same code multiple times. The most common loop is the "for" loop.
Switch Statements: Switch statements are used to execute different code depending on the value of a variable.
Error Handling: Error handling is used to handle errors that occur in your code. The most common error handling technique is the "try-catch" statement.
Selecting Elements: To select an element on a web page, use the "document.querySelector" method. This method takes a CSS selector as its argument.
Modifying Elements: To modify an element on a web page, use the element's properties and methods. For example, you can change the text of an element using the "textContent" property.
Creating Elements: To create a new element on a web page, use the "document.createElement" method. This method takes the name of the element as its argument.
Event Handling: Event handling is used to respond to user actions, such as clicks and key presses. To handle an event, use the "addEventListener" method.
3. Function: A block of code that performs a specific task.
4. Array: A collection of data stored in a single variable.
5. Object: A collection of properties and methods that represent a real-world object.
6. Event: An action that occurs on a web page, such as a mouse click or key press.
7. DOM: The Document Object Model is a programming interface for web documents.
8. Loop: A control structure that repeats a block of code until a condition is met.
9. Conditional statement: A control structure that executes different code based on a condition.
13. Operator: A symbol that performs a specific operation on one or more values.
14. Comparison operator: An operator that compares two values and returns a Boolean value.
15. Logical operator: An operator that combines two or more Boolean values and returns a Boolean value.
16. Assignment operator: An operator that assigns a value to a variable.
17. Increment operator: An operator that increases the value of a variable by one.
18. Decrement operator: An operator that decreases the value of a variable by one.
20. Scope: The area of a program where a variable can be accessed.
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