Block in Ruby is a similar concept to any method. Ruby block allows us to use all calculations and manipulation in the same way as to how we perform inside any method. So we can say blocks in Ruby are similar to any method, but blocks do not belong to any objects, broadly we can say that there could be three types of block in Ruby first block with doing and end, block with inline (basically a block with curly braces) and a block which can get some argument with help of the pipe symbol(||)

We can divide the syntax for blocks in Ruby into three sections.

Writing block within the do and end statement. In the below syntax we have created a block with the name of the block, here this block contains some code statements which will be executed.

 Name of block do
#code statement 1
#code statement 2
#code statement 3
…
End 

Writing block with help of curly braces. In this syntax block, we have created a block with the name of the block and within this, we have created a block with curly braces which contains some codes for executions.

name of the block( #list of the statement which is going to be executed )

A block where we can also pass some arguments. To pass an argument to a block, we can use the || symbol which allows us to pass the argument blocks.

Ruby Block plays a very vital role in handling various manipulations and it is a substitute for methods in Ruby. Many people are not comfortable with writing blocks in Ruby, they preferred to writing method instead of writing block. 

Any block is similar to the closure of other programming languages.

The biggest advantage of using a block is it can get any number of arguments and return a value.

Block also performs tasks in the same way how methods work. For example, in the block, we can do addition and any arithmetic operations.

Every block is made of code chunks, which means it contains the chunks of the codes which are performing a separate activity.

An important thing about the block is it will always call by any method or we can pass it to any other method.

Below is an example to create a block with the do and end statement. Here in the below example, we have taken some user lists of arrays and we are running each on them. Each will go through each element of the user list and we have mentioned the do block which will keep getting each name.

("Ranjan", "Ajay", “Vijay”,"Suresh").each do [name}
puts name
end

Here we are using the concept of the inline or curly braces statement logic. We can see in the below example we have taken some user lists and we have used each method to repeat for printing every element of the user list.

("Ranjan", "Ajay", "Vijay","Suresh").each (|name| puts name)

Below is an example where we are passing the argument to the blocks.

students = ("Ranjan", "Ajay", "Vijay","Suresh","Anjali","Alka","Priya","Vivek","Suresh","Nikita","Krishna","Jaya") students.each do [students]
puts students
end

  We can see in the below example we have taken some number lists and we have used a select method to repeat for finding odd numbers out of the given list of the numbers. Every element of the number list will be traversed and checked if it is odd or n .

puts (22, 21, 19, 11, 51,31).select [ |number| number.odd? ]

  We saw ruby blocks with some practical and useful examples.   we saw the working of the blocks and theirs various types of syntax and their  importance of them in the real world. 

Ruby blocks are anonymous functions that can be passed into methods. Blocks are enclosed in a do-end statement or curly braces ().

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