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Function Expressions vs Function Declarations JavaScript provides two primary ways to define functions: function declarations and function expressions. While both approaches create callable functions, they behave differently in terms of hoisting and usage patterns. Function Declarations A function declaration uses the function keyword to define ...

The let Declaration Basic Usage The let keyword introduces block-scoped variables. Unlike var, variables declared with let are not accessible outside their containing block. // Example with var { var globalVar = 'leaks'; } console.log(globalVar); // Outputs: leaks // Example with let { let blockScoped = 'does not leak'; } console.log(block ...