javascript in 100 seconds
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javascript is a popular programming language used for creating interactive and dynamic web pages. here's a quick tutorial about javascript in 100 seconds:
1. **variables**: variables in javascript are used to store data values. you can declare a variable using the `var`, `let`, or `const` keyword.
2. **data types**: javascript has several data types including numbers, strings, booleans, arrays, objects, and more.
3. **functions**: functions are blocks of code that perform a specific task. you can define functions using the `function` keyword.
4. **conditional statements**: javascript uses `if`, `else if`, and `else` statements to make decisions in the code based on certain conditions.
5. **loops**: javascript provides `for`, `while`, and `do...while` loops to iterate over data and execute code repeatedly.
6. **dom manipulation**: javascript can be used to manipulate the document object model (dom) of a web page, allowing you to change elements, styles, and content dynamically.
7. **events**: javascript can respond to user actions like clicks, keypresses, etc., by using event listeners.
8. **ajax**: asynchronous javascript and xml (ajax) allows you to make server requests without reloading the entire page, enabling dynamic content updates.
here's a simple example of javascript code that displays a message when a button is clicked:
this example demonstrates how javascript can interact with html elements to create dynamic behavior on a web page.
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