How to resolve the algorithm Loops/For step by step in the Ruby programming language
How to resolve the algorithm Loops/For step by step in the Ruby programming language
Table of Contents
Problem Statement
“For” loops are used to make some block of code be iterated a number of times, setting a variable or parameter to a monotonically increasing integer value for each execution of the block of code. Common extensions of this allow other counting patterns or iterating over abstract structures other than the integers.
Show how two loops may be nested within each other, with the number of iterations performed by the inner for loop being controlled by the outer for loop. Specifically print out the following pattern by using one for loop nested in another:
Let's start with the solution:
Step by Step solution about How to resolve the algorithm Loops/For step by step in the Ruby programming language
This Ruby code uses the map
method on the range 1..5
to create a new array by transforming each element in the range using the provided block. The block takes a single argument, i
, which represents the current element in the range, and returns a string of *
characters repeated i
times. The resulting array is then printed to the console.
Here's a breakdown of the code:
(1..5) # This is a range object representing the integers from 1 to 5
The range object (1..5)
is created using the ..
operator, which creates a range that includes the starting and ending values. In this case, the range includes the integers from 1 to 5, inclusive.
.map { |i| "*" * i } # This is a call to the map method on the range object
The map
method is called on the range object and takes a block as its argument. The block is executed for each element in the range, and the return value of the block is added to the new array. In this case, the block takes a single argument, i
, which represents the current element in the range. The block returns a string of *
characters repeated i
times.
puts # This prints the resulting array to the console
The resulting array is printed to the console using the puts
method. The output will look like this:
*
**
***
****
*****
Source code in the ruby programming language
puts (1..5).map { |i| "*" * i }
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