Python

input() fuction in Python

Click for All Topics

input() fuction in Python

It is a built-in function that allows user input.

When we execute the input() function ,it stops the program execution and waits for user response and after getting the input it starts the further execution of the program.

It takes optional arguments and returns entered input by user in string format.

When users don’t provide any input ,it returns empty string.

Syntax –

input(prompt)

Parameter –

prompt(optional) → a string, that displays a message when the function executes.

return → returns provided input strings by user, default value is empty strings ‘ ’ .

Example 1: Basic Input

				
					# Simple input and display
user_name = input("Enter your name: ")
print("Hello, " + user_name +" this is edSlash" + "!")

# Output -
# Enter your name: Harshil
# Hello Harshil, this is edSlash!

In the above example ,firstly the input function executes and display the message (’Enter your name:’) on the user console and gets user name as an input.

After getting the input is stored in user_name variable.

Finally it prints the user name with the welcome message on the output screen.

Example 2: Numeric Input and Conversion

				
					# Taking age as input and performing a calculation
age_str = input("Enter your age: ")
age = int(age_str)  # Convert the entered string to an integer
future_age = age + 10
print("In 10 years, you will be", future_age, "years old.")

# Output - 
# Enter your age: 20
# In 10 years, you will be 30 years old.

Example 3: Conditional Input

				
					# Using input in a conditional statement
response = input("Do you want to continue? (yes/no): ")
if response.lower() == 'yes':
    print("Continuing...")
else:
    print("Cancelled.")


# Output -
# Do you want to continue? (yes/no): no
# Cancelled.

Example 4: Multiple Inputs

				
					# Taking multiple inputs and performing a calculation
length_str = input("Enter the length: ")
width_str = input("Enter the width: ")

length = float(length_str)  # Convert the entered strings to floats
width = float(width_str)

area = length * width
print("The area is:", area)

# Output -
# Enter the length: 10
# Enter the width: 5
# The area is: 50.0

Example 5: Input Validation

				
					# Handling invalid input with a try-except block
try:
    quantity_str = input("Enter the quantity: ")
    quantity = int(quantity_str)
    if quantity > 0:
        print("Valid input. Quantity:", quantity)
    else:
        print("Please enter a positive quantity.")
except ValueError:
    print("Invalid input. Please enter a valid integer.")


# Output -
# Enter the quantity: 10
# Valid input. Quantity: 10

Python

input() fuction in Python

input() fuction in Python

Talk to our Industry Experts for Career Counselling

Company

Platform

Resources

Get in touch