User Input (input())

User Input in Python allows a program to take information from the user while the program is running using the input() function.

It helps make programs interactive by letting users enter:

• Names
• Numbers
• Choices
• Answers

In simple words, the program asks a question and the user responds.

Real-Life Analogy

User input is like a teacher asking a question and a student giving an answer.

• Teacher asks → “What is your name?”
• Student answers → “Ravi”

Similarly, a Python program asks and the user responds.

What is the input() Function?

The input() function is used to take data from the keyboard.

Syntax

input()

Usually we add a message:

input("Enter your name: ")

How input() Works

• Program waits for user input
• User types a value
• Presses Enter
• Value gets stored in a variable

Important:

By default, input() stores data as a string (text).

Example of User Input

name = input("Enter your name: ")
print("Hello", name)

Output

Enter your name: Ravi
Hello Ravi

Example - 1

age = input("Enter your age: ")
print("You are", age, "years old")

Output:

Enter your age: 12
You are 12 years old

Taking Number Input (Using Type Conversion)

Since input() stores text, we use int() or float() for numbers.

Example:

num = int(input("Enter a number: "))
print(num + 5)

Output:

Enter a number: 10
15

✔ int() converts text into a number.

Practical Example

name = input("What is your name? ")
print("Welcome", name)

This is like asking a question and getting an answer.

Example

name = input("Enter your name: ")
age = int(input("Enter your age: "))

print("Hello", name)
print("Next year age:", age + 1)

Output

Enter your name: Ravi
Enter your age: 12

Hello Ravi
Next year age: 13

Common Mistake (Important)

Wrong:

age = input("Enter age: ")
print(age + 1)

 Error

Because input() stores a string.

Correct Way

age = int(input("Enter age: "))
print(age + 1)

Common Beginner Mistakes

• Forgetting input is stored as text
• Using numbers without int() conversion
• Missing brackets in input()
• Spelling errors in variable names

Why User Input is Important

User input in Python helps:

• Make programs interactive
• Accept information from users
• Perform calculations
• Build real applications

➤ Key Points

• input() is used to take user input
• Input is stored as a string by default
• Use int() or float() for numbers
• Makes programs interactive and dynamic

➤ Tips for Students

• Always write a message inside input()
• Convert number inputs using int()
• Check brackets and spelling
• Practice making your own input programs