Ruby - Get User Input

1. Introduction

To make programs dynamic and user-driven, it's often necessary to take various kinds of inputs. In Ruby, the gets method is typically used to capture this input. However, the nature of the input (string, integer, float, etc.) requires us to handle it differently to use it correctly in our program. This guide will demonstrate how to capture various types of inputs from the user.

2. Program Steps

1. Open your Ruby environment or editor.

2. Use the puts method to ask the user for a specific type of input.

3. Capture the input using the gets method.

4. Convert the input to the desired type (if necessary).

5. Display the input.

3. Code Program

# Ask the user for a string input
puts "Enter your name:"
name = gets.chomp
puts "Hello, #{name}!"
# Ask the user for an integer input
puts "Enter your age:"
age = gets.chomp.to_i
puts "You are #{age} years old."
# Ask the user for a floating-point number
puts "Enter your height in meters:"
height = gets.chomp.to_f
puts "Your height is #{height} meters."
# Ask the user for a boolean (yes/no) input
puts "Are you a programmer? (yes/no)"
is_programmer = gets.chomp.downcase == 'yes' ? true : false
puts "Programmer status: #{is_programmer}"

Output:

Enter your name:
John
Hello, John!
Enter your age:
25
You are 25 years old.
Enter your height in meters:
1.75
Your height is 1.75 meters.
Are you a programmer? (yes/no)
yes
Programmer status: true

4. Step By Step Explanation

1. name = gets.chomp: This captures a string input. chomp is used to remove the newline that gets method adds it by default.

2. age = gets.chomp.to_i: The gets method returns a string by default. We chain the to_i method to convert the string to an integer.

3. height = gets.chomp.to_f: Similar to the above, but we use to_f to convert the string to a floating-point number.

4. For the boolean input, we check if the user's response is 'yes'. We use the ternary operator to assign true if the user's input is 'yes', and false otherwise. It's important to use downcase to make the comparison case-insensitive.


Related Ruby Examples:

Ruby - Print Hello World Ruby - Get User Input Ruby - Display Current Date and Time Ruby - Print Environment Variables Ruby - Explain Variable Scopes Ruby - Calculate the Sum of Two Numbers Ruby - Find the Factorial of a Number Ruby - Check If a Number is Even or Odd Ruby - Generate a Random Number Ruby - Implement the Pythagorean Theorem Ruby - Calculate the Square Root of a Number Ruby - Check if a Number is Prime Ruby - Find the Greatest Common Divisor (GCD) Ruby - Check Leap Year Ruby - Print Power of a Number Ruby - Print Fibonacci Series Ruby - Count the Number of Digits in a Number Ruby - Unary operators Ruby - Arithmetic operators Ruby - Bitwise operators Ruby - Logical operators Ruby - Ternary operator Ruby - Assignment operators Ruby - Comparison operators Ruby - Convert a String to Uppercase and Lowercase Ruby - Reverse a String Ruby - Count Vowels in a String Ruby - Find the Length of a String Ruby - Replace Substrings Ruby - Split a String into Words Ruby - Join an Array into a String Ruby - Check if a String Starts with Another String Ruby - Check if a String is a Palindrome Ruby - Find the Length of an Array Ruby - Find the Maximum Element in an Array Ruby - Find the Minimum Element in an Array Ruby - Search for an Element in an Array Ruby - Sort an Array Ruby - Reverse an Array Ruby - Array Create, Add, and Remove Example Ruby - Merge Two Arrays Ruby - Create and Use a Hash Ruby - Find the Size of a Hash Ruby - Check if a Key Exists in a Hash Ruby - Merge Two Hashes Ruby - Iterate Over a Hash Ruby - If-Else Condition Ruby - Case Statement Ruby - While Loop Ruby - For Loop Ruby - OOPs Concepts Ruby - Define and Instantiate a Simple Class Ruby - Instance Variables Ruby - Class Methods and Variables Ruby - Inheritance Example Ruby - Polymorphism Example Ruby - Abstraction Example Ruby - Modules and Mixins Ruby - Encapsulation Example Ruby - Association Example Ruby - Composition Example Ruby - Aggregation Example Ruby - method_missing Example Ruby - define_method Example Ruby - Create Custom Exception Class Ruby - Create a New File and Write Content Ruby - Open and Read from a File Ruby - Append Data to an Existing File Ruby - Delete a File Ruby - Different File Modes Ruby - Read a File Line by Line Ruby - Create a New Directory Ruby - Rename a Directory Ruby - Delete a Directory Ruby - Check if a File Exists Ruby - Get a File Size Ruby - Check if a Path is a File or a Directory Ruby - Get File Modification Time Ruby - Count Number of Words in a File Ruby - Count Occurrences of a Specific Word in a File Ruby - Compress a File using Gzip Ruby - Extract a Gzip Compressed File Ruby - Create a Tar Archive Ruby - Handle Division by Zero Exception Ruby - Handle NoMethodError by Using begin-rescue-end Ruby - Handle Custom Exceptions using rescue Ruby - Handle Custom Exceptions using rescue Ruby - Handle Multiple Exceptions Using Multiple rescue Blocks Ruby - Print the Backtrace of an Exception Ruby - Define Global Exception Handling using at_exit

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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