Function in Javascript › Block scope in JavaScript › Question #20285
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QWhat will be the output of the following JavaScript code? 
 
let a = 11;
let a = 12;

ID: #20285 Block scope in JavaScript 101 views
Question Info
#20285Q ID
EasyDifficulty
Block scope in JavaScriptTopic
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  • A 10 ✔ ✖
  • B 12 ✔ ✖
  • C Undefined ✔ ✖
  • D Error ✔ ✖
Correct Answer: Option D

Explanation


const a = 12;
      ^

SyntaxError: Identifier 'a' has already been declared
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