Understand synchronous Vs asynchronous code in Js

Synchronous code runs step by step where each step has to wait for previous one to be executed.

Example:

console.log("Hello Friends");
console.log("Hello");
console.log("Nice to meet you");

Here each line will execute then next until all finish.

But for asynchronous code it doesn't respect order stuff ,it get executed out of sequence.
Example:

console.log("Hello");
setTimeout(()=>console.log("Wait for 3 Second"),3000);
console.log("See you again");

First line will execute and last while for second one it has to wait for 3seconds to it will execute last.

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