Ruby - Find the Length of an Array

1. Introduction

Arrays are one of the fundamental data structures in programming. They can hold multiple items, and often, one of the basic operations you might need to perform is finding out how many items (or elements) are inside an array. In Ruby, this task is straightforward thanks to its built-in methods. In this post, we'll demonstrate how to determine the length (or size) of an array in Ruby.

2. Program Steps

1. Define or initialize an array.

2. Use the length or size method of the array to get its length.

3. Print the length to the console.

3. Code Program

# Define an array
sample_array = [10, 20, 30, 40, 50]
# Find the length of the array
array_length = sample_array.length
# Output the length
puts "The length of the array is: #{array_length}"

Output:

The length of the array is: 5

Explanation:

1. sample_array = [10, 20, 30, 40, 50]: Here, we define an array named sample_array containing five integers.

2. sample_array.length: The length method returns the number of elements in the array. In Ruby, you can also use the size method as an alias for length.

3. puts: This is used to print the result to the console.

Thus, with just a few lines of code, Ruby allows you to efficiently determine the number of elements in an array.


Related Ruby Examples:

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Ruby Tutorials

Ruby Hash Tutorial Ruby String Tutorial Ruby Array Tutorial Ruby - Match a Pattern in a String Ruby - map Function Example Ruby - reduce Function Example Ruby - select Function Example Ruby - Date and Time Example Ruby - Create and Execute a Basic Thread Ruby - Main Thread and Sub-threads Ruby - Pause Execution of Thread Using sleep Ruby - Terminate a Thread Using Thread.kill Ruby - Check Status of a Thread Using alive? Ruby - Thread Priority Example Ruby - Use Thread.pass for Thread Scheduling Ruby - Thread Local Variables Ruby Convert String to Hash Ruby Convert String to JSON Ruby Convert String to Integer Ruby Convert String to Array Ruby Convert String to Date Ruby Convert String to CamelCase Ruby Convert String to Boolean Ruby Convert String to Float Ruby Convert String to DateTime Ruby Convert Number to String Ruby Convert Number to Binary Ruby Convert Number to Boolean Ruby Convert List to Set Ruby Convert List to String Ruby Convert List to Hash Ruby Convert List to Map Ruby Convert Array to List Ruby Convert Array to Hash Ruby Convert Array to Hash With Index as Key Ruby Convert Array to Set Ruby Convert Array to String Comma Separated Ruby Convert Array of Strings to Integers Ruby Convert Array to JSON Ruby Convert Array of Hashes to JSON Ruby Convert Hash to JSON Ruby Convert Hash to String Ruby Convert Hash to Array Convert Hash Keys to Strings Ruby Convert Date to DateTime Ruby Convert Date to Epoch Ruby Convert Date to TimeStamp Ruby Convert Date to Milliseconds

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