Web Reference: Jul 15, 2025 · Blocks are the simplest form of Ruby closure. It is not an object but it is a piece of code which is enclosed in between braces {} or do...end. You can pass one or more variables into your block depending upon how the code block is written. You can use yield statement to call a block within a method with a value. It does not have their own name. In Ruby, the difference is mainly a different kind of syntax for higher order functions. In other languages, you have to specify explicitly that a function can accept another function as an argument. But in Ruby, any method can be called with a block as an implicit argument. Blocks, procs, and lambdas are collectively known as Ruby closures — callable objects that capture the surrounding variable scope and can be stored, passed around, and executed later.
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