What is the default input in python with example

What is the default input in python with example

I'll respond in English for now.

In Python, when you run a script without specifying any input files or arguments, it will execute as if you had provided the input() function's default value as an argument. This is known as "default input" or "default argument."

Let's see this with an example:

def greet(name = "World"):
print(f"Hello, {name}!")
greet()  # Output: Hello, World!

In the above code snippet, name is a function parameter that defaults to "World" if no value is provided. When we call the greet() function without passing any arguments (like greet()), Python will automatically pass the default value "World" as an argument to the function.

This behavior can be useful when you want your program to have some default behavior or settings that can be overridden by the user if needed. For example:

def calculate_total(prices = [0, 0]):
total_price = sum(prices)
return total_price
total = calculate_total()
print(total)  # Output: 0 (since prices is an empty list)
You can override the default values by providing a custom input
custom_prices = [10, 20]
total = calculate_total(custom_prices)
print(total)  # Output: 30 (the sum of the custom prices)

In this example, we're using the prices parameter as an optional input. When called without any arguments (calculate_total()), Python will execute with default values for prices, which is an empty list [0, 0]. If you want to calculate the total price based on some specific prices, you can override the default by providing your own custom prices.

Remember, when writing functions in Python, using default input (or arguments) allows you to make your code more flexible and easier to use.

What is input() in Python?

I'd be happy to explain what input() is in Python!

In Python, the input() function is used to read input from the user. It allows you to get a string input from the user and convert it into a Python object (such as an integer or float) if needed.

When you call input(), it prompts the user to enter some text or a value, and then returns what the user types in as a string. You can then use this input to perform various operations or calculations in your program.

Here's an example of how you might use input():

name = input("What is your name? ")
print("Hello, " + name + "! Nice to meet you!")

In this code snippet, the user is asked to enter their name. The input() function returns what the user types in as a string and assigns it to the variable name. Then, the program prints out a greeting message that includes the user's name.

One of the most useful features of input() is that it allows you to prompt the user for specific types of input, such as numbers or dates. For example:

age = int(input("How old are you? "))
if age < 18:
print("Sorry, but you're too young to enter this contest.")
else:
print("You're eligible to participate!")

In this code, the user is asked for their age as a number. The input() function returns what the user types in as a string. Then, we use the int() function to convert that string into an integer value, which we can then use in our program.

Another great thing about input() is that it's very flexible and can handle all sorts of different inputs. For example:

favorite_food = input("What is your favorite food? ")
if favorite_food.lower() == "pizza":
print("Mmm, pizza is a classic choice!")
elif favorite_food.lower() == "sushi":
print("Sushi lover, eh?")
else:
print("Hmm, that's an interesting choice...")

In this code, the user is asked to enter their favorite food. The input() function returns what the user types in as a string, and then we use some simple conditional logic (an if statement) to respond based on the user's input.

Overall, the input() function is an incredibly useful tool for building interactive programs that can engage with users and get them involved. It allows you to gather input from the user, process it in various ways, and then use that information to perform all sorts of different operations or calculations.