Use let and const Instead of var

The super hacks will help you become a more efficient and effective JavaScript developer. 

Problem: var has function scope, which can lead to bugs and unpredictable behavior.

Solution: Use let and const, which have block scope.

Code Snippet

let count = 0;  
const PI = 3.14;  
            

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Using let and const ensures variables are only accessible within the block they are defined, preventing scope-related bugs.

Why it matters:let allows reassignment, while const is for constants.

• Block scope prevents accidental variable leaks outside the intended scope.