Python user input ⌨️ (2024)

Introduction

Python user input tutorial

#python #user #input

name = input("What is your name?: ")
age = int(input("How old are you?: "))
height = float(input("How tall are you?: "))

print("Hello "+name)
print("You are "+str(age)+" years old")
print("You are "+str(height)+"cm tall")

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Video

Hey, what's going on everybody, it's bro, hope you're doing well and in this video I'm going to teach you guys how we can accept some user input in python, so sit back, relax and enjoy the show.

If you wouldn't mind, please like comment and subscribe, one like equals one prayer for the youtube algorithm.

Ladies and gentlemen, this is where the fun begins in this video, I'm going to explain how we can accept some user input in python, and we do so by using the input function and then we type in our input to the console window, but it would probably be good practice to let the user know what we want them to type in exactly so, let's ask for somebody's name within quotes inside the input function, I'm going to type.

What is your name, and now our program will wait for us to enter in some user input, so you can use your own name.

For this example, I'm going to type bro now to submit some user input you just type or press enter.

Now you can see that my process finished with exit code 0.

That means the program is done running, so we should probably do something with this value.

We can actually assign it to a variable, so we can use it elsewhere in our program.

So to do so, we precede input with a variable.

Like name works name, equals input, and when we accept some user input we will assign it to this variable that we called them, and now we can do something with it.

So, let's print a message involving our name variable that we have so how about hello, plus name.

Now, when I run this program, we can accept some user input and then do something with that input such as display message that says hello, bro and then you can type in whatever you want.

For your name.

Let's say I'm dude.

What is your name dude, hello, dude now this next part is very important.

When we accept user input, it is always of the string data type, a series of characters.

What if we need to accept a number? Well, you can, but you can't normally perform any math on it, because it's of the string data type we would need to cast it as either of the integer data type or of the float data type.

So here's an example of why we can't perform any math on a string.

Let's say we have a variable called edge age equals input, and let's ask how old somebody is.

How old are you now? I will add one to somebody's age: let's pretend it's their birthday age equals age plus one this will add one to their age.

Now, let's try and run this.

What is your name bro? How old are you? Let's say that I'm 21.

okay, we ran into an air.

A type error can only concatenate string to string with what I mentioned previously.

We cannot normally use strings for any sort of mathematical equation or operation, we'll want to cast it to the integer or the float data type.

So, let's cast our user input to the integer data type and we will surround our user input with a cast, surround your input with a set of parenthesis and precede this with int, and now we can use this user input in a mathematical operation.

So let's try it even though this won't display age yet.

So what is your name? Bro 21 and our program finished with an x account of zero.

There were no problems now, let's attempt to display this age, so I will print u r, plus age plus years old, we're doing some string concatenation here.

What is your name bro? How old are you 21? Alright, we ran into a type error again, can only concatenate string to string.

You cannot normally display a variable of the integer data type along with strings because we're doing string, concatenation we're adding strings together.

We would need to convert this variable back to the string data type, so we can cast it we'll surround our edge variable with a cast.

Now this is what's gonna happen.

We will accept some user input, it will be of the string data type and then we will immediately cast it to be of the integer data type so that we can treat it as a number instead of a character.

And then, if we need to display this age, we will need to convert it back to a string so that we can use some string concatenation and display all of these strings together and now, let's try this theory.

So what is your name bro? How old are you? Let's say: I'm 21, hello, bro.

You are 22 years old, here's a situation.

What if we enter a number that contains a decimal portion? So let's try this again, let's say I'm 21.5 years old.

Well now we ran into a different issue a value error invalid literal for int with base 10.

That means, if we cast a string as an integer, it can only be a whole number, a portion that does not contain a decimal, and that is where the float data type would come in.

It is a data type that can contain a decimal portion.

For this example, let's create a third variable called height, and we will ask for somebody's height input, we'll create a prompt that says how tall are you and we will cast this to be of the float data type so that our string, our user input, can contain a decimal portion and then we can treat it as a number instead of a series of characters, and I think I will delete this line, we won't really need it anymore and then, let's print their height along with a message- u r, plus then height, but we need to cast this back to being a string, so we'll surround our height with a cast plus, let's say cm tall all right.

Let's test this: what is your name bro? How old are you? Let's say: I'm 21? How tall are you? Let's pretend that I'm 250.5 centimeters tall, I'm adding the 0.5 just to test to see if this will accept a floating point? Number: hello, bro! You are 21 years old.

You are 250.5 centimeters tall, not really all right everybody, so that is the basics of user input in python.

Normally, with user input, it will give you a value of the string data type if you need to use that value for any sort of math, you'll probably need to cast it to be of the integer or the float data type.

So if you would like a copy of this code, I will post this in the comment section down below, but yeah: that's how to accept user input in python.

Hey you yeah, I'm talking to you.

If you learned something new, then help me help you in three easy steps by smashing that, like button drop, a comment down below and subscribe, if you'd like to become a fellow bro, so you.

Python user input ⌨️ (2024)

FAQs

How do you get an answer from a user in Python? ›

In Python, we use the input() function to ask the user for input. As a parameter, we input the text we want to display to the user. Once the user presses “enter,” the input value is returned. We typically store user input in a variable so that we can use the information in our program.

How do I keep asking for user input until invalid in Python? ›

Here's one clean way:
  1. use a while True loop.
  2. use input() to get the user input.
  3. use a try-except block to catch invalid inputs.
  4. use an else block to break if the input is valid.

How do you pass user input in Python? ›

Example - 2
  1. # Python program showing.
  2. # a use of input()
  3. name = input("Enter your name: ") # String Input.
  4. age = int(input("Enter your age: ")) # Integer Input.
  5. marks = float(input("Enter your marks: ")) # Float Input.
  6. print("The name is:", name)
  7. print("The age is:", age)
  8. print("The marks is:", marks)

How do I make sure user input is int in Python? ›

To check if the input string is an integer number, convert the user input to the integer type using the int() constructor. To check if the input is a float number, convert the user input to the float type using the float() constructor.

How do you ask a question and answer in Python? ›

Asking Questions

Input enter data. Use the input. You must save the answer into a suitably named variable = When you run the program (F5) you can type your answer on any question line in the Python Shell.

How do you get responses from a request in Python? ›

When one makes a request to a URI, it returns a response. This Response object in terms of python is returned by requests. method(), method being – get, post, put, etc. Response is a powerful object with lots of functions and attributes that assist in normalizing data or creating ideal portions of code.

How do you ask for user input multiple times in Python? ›

Taking Multiple Input in Python Using the split() Method

To give multiple input in Python, the split() function in Python helps to split the multiple input fed by the user into single individual values for each variable. The method takes two parameters as part of its syntax that is, the separator and the maxsplit.

How do you add a constraint to an input in Python? ›

Defining custom constraints
  1. Add a new custom constraint to the model - use search or browse the rules catalog. ...
  2. Define details of the constraint by entering the so called Rule specification. ...
  3. Provide or clarify parameter values if needed.
  4. Edit code to enter actual Python custom code for the constraint using DOcplex API.
Jun 21, 2022

How do you input in Python without prompt? ›

input() – without prompt message

Prompt string is an optional argument to input() function. In this example, let us not provide a string argument to input() and read a string from user.

What is input () function in Python? ›

Python input() function is used to get input from the user. It prompts for the user input and reads a line. After reading data, it converts it into a string and returns that.

How to check if user input is enter Python? ›

user_input=input("ENTER SOME POSITIVE INTEGER : ") if((not user_input) or (int(user_input)<=0)): print("ENTER SOME POSITIVE INTEGER GREATER THAN ZERO") #print some info import sys #import sys. exit(0) #exit program ''' #(not user_input) checks if user has pressed enter key without entering # number.

How do you check if user input is not an int value? ›

Program to check if input is an integer or a string
  1. Take input string from user.
  2. Initialize a flag variable “isNumber” as true.
  3. For each character in the input string: a. ...
  4. If the “isNumber” flag is true, print “Integer.”
  5. If the “isNumber” flag is false, print “String.”
Apr 13, 2023

How do you force an integer in Python? ›

To convert, or cast, a string to an integer in Python, you use the int() built-in function. The function takes in as a parameter the initial string you want to convert, and returns the integer equivalent of the value you passed. The general syntax looks something like this: int("str") .

How do you timeout an input function in Python? ›

Set an Input Time Limit using the inputimeout module

Here, we used the inputimeout() function, which will take timed input in Python. Then, handle the errors using except block and declare the timeout statement. Finally, print the statement on timeout.

How do you ask a question multiple times in Python? ›

If you already know that you want to loop a times, just use for i in range(a): . Then you automatically end after a sets of questions and additionally you can use i+1 for your object counter in the questions. You need one final statement in your loop: a += 1 . Better yet, replace the while with a for loop.

How do you make this program ask for input again if invalid input is entered in C programming? ›

2 Answers. while(scanf("%f",&num1)==0) //Taking Input Here Once { printf("Invalid input. Please enter a number."); scanf("%f",&num1); //Again Taking input. }

What is the exception for user input in Python? ›

We can make exceptions with the try and except blocks in Python as an easy way to handle error types such as ValueError and ZeroDivisionError . Certain programs that accept input from a user will need the try and except blocks to avoid any probable error from user input.

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