Block
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What is Block?
Block scope limits a variable's visibility to the block of code enclosed in curly braces {} where it is declared. Variables declared with let and const are block-scoped. A variable inside an if statement or for loop with block scope is not accessible outside that block.
Free resources to learn Block
- ArticleJavaScript Scope
More in stage 2: All about Variables
Block: common questions
Can I learn Block in Hindi?
This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain Block in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.
Is this Block tutorial for beginners?
It is lesson 14 of 124 in the free JavaScript roadmap, in stage 2, All about Variables. If you are new to JavaScript, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.