R Program to Take Input from User

Introduction

In R, you can take input from the user using the readline() function. This guide will demonstrate how to write an R program that takes different types of input from the user, processes it, and displays the result.

Problem Statement

Create an R program that:

• Prompts the user to enter their first name, last name, email, age, and gender.
• Takes the input from the user for each field.
• Displays the entered data.

Example:

• Input:
  • Enter your first name: Ramesh
  • Enter your last name: Fadatare
  • Enter your email: ramesh.fadatare@example.com
  • Enter your age: 35
  • Enter your gender: Male
• Output:
  • Name: Ramesh Fadatare
  • Email: ramesh.fadatare@example.com
  • Age: 35
  • Gender: Male

Solution Steps

1. Prompt the User for Input: Use the readline() function to prompt the user to enter their first name, last name, email, age, and gender.
2. Capture the User Input: Store each piece of input in a separate variable.
3. Display the Input: Use the print() function to display the captured data back to the user.

R Program

# R Program to Take Input from User
# Author: https://www.javaguides.net/

# Step 1: Prompt the user to enter their first name
first_name <- readline(prompt = "Enter your first name: ")

# Step 2: Prompt the user to enter their last name
last_name <- readline(prompt = "Enter your last name: ")

# Step 3: Prompt the user to enter their email
email <- readline(prompt = "Enter your email: ")

# Step 4: Prompt the user to enter their age
age <- as.numeric(readline(prompt = "Enter your age: "))

# Step 5: Prompt the user to enter their gender
gender <- readline(prompt = "Enter your gender: ")

# Step 6: Display the captured information
print(paste("Name:", first_name, last_name))
print(paste("Email:", email))
print(paste("Age:", age))
print(paste("Gender:", gender))

Explanation

Step 1: Prompt the User to Enter Their First Name

• The readline() function is used to prompt the user for their first name. The input is captured as a character string in the first_name variable.

Step 2: Prompt the User to Enter Their Last Name

• The readline() function is used again to prompt the user for their last name, which is stored in the last_name variable.

Step 3: Prompt the User to Enter Their Email

• The readline() function captures the email input and stores it in the email variable.

Step 4: Prompt the User to Enter Their Age

• The readline() function prompts the user for their age, which is then converted to a numeric value using as.numeric() and stored in the age variable.

Step 5: Prompt the User to Enter Their Gender

• The readline() function captures the gender input and stores it in the gender variable.

Step 6: Display the Captured Information

• The print() function is used to display the user’s full name, email, age, and gender.

Output Example

Example:

Enter your first name: Ramesh
Enter your last name: Fadatare
Enter your email: ramesh.fadatare@example.com
Enter your age: 35
Enter your gender: Male
[1] "Name: Ramesh Fadatare"
[1] "Email: ramesh.fadatare@example.com"
[1] "Age: 35"
[1] "Gender: Male"

Conclusion

This R program demonstrates how to take multiple inputs from the user, including their first name, last name, email, age, and gender, and then display that information. This example is useful for beginners learning how to work with different types of user input in R.