Input and Output in Python 🖥️

What is Input and Output?

• Input: Data provided by the user to the program.
• Output: Information displayed by the program to the user.
• Together, they allow interaction between the user and the program.

Output in Python

The print() function is used to display output.

print("Hello, World!")
print("The sum of 2 + 3 is", 2 + 3)

Output:

Hello, World!
The sum of 2 + 3 is 5

• You can print text, numbers, or even results of expressions.
• Multiple values can be printed together, separated by commas.

Input in Python

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

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

Example Run:

Enter your name: Alice
Hello, Alice

• By default, input() returns data as a string.
• If you need numbers, convert them using int() or float():

age = int(input("Enter your age: "))
print("Next year you will be", age + 1)

Combining Input and Output

You can use both together to make interactive programs:

num1 = int(input("Enter first number: "))
num2 = int(input("Enter second number: "))
print("The sum is", num1 + num2)

Example Run:

Enter first number: 10
Enter second number: 20
The sum is 30