Here is a detailed explanation of what “Scope” are in JavaScript 💡
1. Block scope
— Variables declared through let and const inside a {} block can only be accessed inside this block.
— Variables declared through let and const inside a {} block can only be accessed inside this block.
2. Function scope
— A function scope variables can only be accessed inside the function.
— A function scope variables can only be accessed inside the function.
3. Global scope
— A variable declared in global namespace becomes a global variable.
— A variable declared in global namespace becomes a global variable.
— Using all three scopes
In a program, we often use all three scopes together.
In a program, we often use all three scopes together.
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