Python | Exploring the syntax and usage of input() to prompt the user for input and retrieve the entered value as a string

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input()

Python is a high-level, interpreted programming language that is known for its simplicity and ease of use. One of the most commonly used built-in functions in Python is the "input()" function. This function is used to allow user input in a program.

The "input()" function allows the user to enter a value or string from the keyboard, which is then stored in a variable. This variable can then be used in the program to perform various operations.

Syntax: The syntax for the input() function is simple. It only requires the function name followed by a set of parentheses.

Example 1:

name = input("Please enter your name: ")

print("Hello, " + name + "!")

In this example, the user is prompted to enter their name, which is then stored in the "name" variable. The "print()" function is then used to output a greeting that includes the user's name.

Output:

Please enter your name: John

Hello, John!

Example 2:

age = input("How old are you? ")

age = int(age)

print("In ten years, you will be " + str(age + 10) + " years old.")

In this example, the user is prompted to enter their age, which is stored in the "age" variable. Since the input function always returns a string, we have to use the int() function to convert the string to an integer. The program then adds 10 to the user's age and outputs the result.

Output:

How old are you? 30

In ten years, you will be 40 years old.

One important thing to keep in mind when using the "input()" function is that it always returns a string. If you need to perform any numerical operations with the input, you will need to convert it to an integer or a float using the int() or float() function.

In conclusion, the "input()" function is a powerful tool in Python that allows users to provide input to a program. With this function, developers can create interactive applications that can respond to user input in real-time.