Web Reference: Ruby blocks and iterators are fundamental to writing idiomatic Ruby code. They’re what make Ruby feel natural and expressive. In this tutorial, you’ll learn what blocks are, how to use them with iterators, and how to create your own methods that accept blocks using yield. Jul 11, 2025 · Blocks are called closures in other programming languages. There are some important points about Blocks in Ruby: Block can accept arguments and returns a value. Block does not have their own name. Block consist of chunks of code. A block is always invoked with a function or can say passed to a method call. Every Ruby source file can declare blocks of code to be run as the file is being loaded (the BEGIN blocks) and after the program has finished executing (the END blocks). A program may include multiple BEGIN and END blocks.
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