Can let statements in es6 have the same name?

In es6, variables declared by let cannot have the same name, because let does not allow the same variable to be declared repeatedly in the same scope, otherwise an error will occur; therefore, let can be used to prevent duplication of variable naming, and Prevent variable pollution; the opposite of let is var, which allows repeated declaration of variables.

The operating environment of this tutorial: Windows 10 system, ECMAScript version 6.0, Dell G3 computer.

Can the let declaration in es6 have the same name?

The let declaration in es6 cannot have the same name

let is not allowed to be declared repeatedly in the same scope same variable. Otherwise, an error will be reported

In the same scope, unlike var, the same variable cannot be repeatedly declared using let

function qq(){            var a = 11;
            let a = 22;
        } 
//  SyntaxError：Identifier 'a' has already been declared（标识符a已经被声明）
 function qq(){
            let a = 11;
            let a = 22;
        }//SyntaxError: Identifier 'a' has already been declared（标识符‘a‘已经被重复声明）

When using var to declare a variable, repeated declaration errors will not occur The problem can be declared repeatedly, but using let can prevent duplication of variable naming and prevent variable pollution.

The error result is as follows:

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