create a variable with modifiers in javascript

In JavaScript, you can create a variable using the var, let, or const keywords. These keywords can be used to declare different types of variables with modifiers.

1. var: The var keyword is used to declare a variable that has function scope or global scope. It can be redefined and reassigned.

   index.tsx
   var x = 10;  // variable x declared with var
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2. let: The let keyword is used to declare a variable that has block scope. It can be redefined, but not reassigned.

   index.tsx
   let y = 5;  // variable y declared with let
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3. const: The const keyword is used to declare a variable that has block scope and cannot be reassigned. However, the content of the variable, if it's an object or an array, can be modified.

   index.tsx
   const z = 2;  // variable z declared with const
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It's important to choose the appropriate variable modifier based on the desired scope and mutability of the variable.