#Data Types

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Data types and input function

Programs use input to do certain work, and in order to receive it from another user, we can use the input function.

The input() function always turns the user input into a string, no matter which type of data was originally put into it.

Example:

cost_of_living=input() #user may write down an answer print(type(cost_of_living)) #to specify the data type of the input user has given

answer: <class 'str'> = string

But! You can't do math with strings, so sometimes we need to convert existing data type of a value.

cost= input() #default data type is a string cost=int(cost) #converts into integer cost=float(cost) #converts into float cost=str(cost) #back to string

Side notes: 1. You cannot convert any type of value to an integer or the float, only numeric values!

cost= "one hundred" cost=int(cost) #would result into an error

while:

cost= "100" cost=int(cost) #would convert string into an integer, as desired

2. Another important thing to remember, is that when we are creating a value as an integer, we use quotes "".

But in order to convert a variable into a string, we have to use a function str().

apples = 2 print("apples") # prints "apples", not the string with value 2 apples = str(apples) print(type(apples)) #<class 'str'> print(apples) #2

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Basic Data Types

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https://www.tutornet.in/programing-in-c/what-are-the-data-type-in-c-explain-with-example/

Data Type in C: A data types in C specify the type of data that variables can hold. There are several basic data types in C

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shocking news for everyone who follows me: i love data

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Built-in Functions for Strings in Python!

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Another type of data, used in python, is numerical data.

Unlike strings, numerical values are not quoted with quotation marks:

price = 30

Tip:

Big numbers can be written in a more readable way:

thousand = 1_000

print(thousand)

Output: 1000

million = 1_000_000

print(million)

Output: 1000000

a_really_long_number = 1_000_000_000

print(a_really_long_number)

Output= 1000000000

This way, it would be less confusing for a person dealing with the code!

Numbers can be used to perform some calculations and operations.

Examples:

Operation: Output:

print(110) 110

print(8 + 2) 10

print(10 - 5) 5

print(5 * 3) 15

print(10 / 5) 2.0

Float division: (10 / 5) would give a float number, meaning a number with digits after the coma (like 2.0)

Integer division: using division sign twice (10//5), would give an integer (like 2), without digits after the coma.

Exponentiation: 2**3 = 2*2*2, 5**3=125

👀 Details matter:

num1 = 10

num2 = "10"

Python recognizes num1 as a number and num2 as a string.

It would perform commands differently because of this:

print(2*num1) Output: 20

print(2*num2) Output: 1010

Another example:

print(2*"3+7") Output: 3+7 3+7

print(3+7) Output: 10

print("3+7") Output: 3+7

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Damian: So you're going on a mission with Zatanna to the Middle East, right?

Raven: Yes, we leave tomorrow.

Damian: Well, there are some words you should memorize and use them with anyone you meet, okay? Repeat after me "ladaya sadiq."

Raven: La-dayaaa sa-diq?... Ladaya sadiq. What does it mean?

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Raven: I understand, thanks for the advice, see you in a few days.

*The next day somewhere in the Middle East during a fight with some ifrites *

Raven, shouting out : LADAYA SADIQ!!!

An Imamah who went to help them : I'm happy for you but I don't think these demons really care if you have a boyfriend or not.

Raven: That's what it means?!

Imamah: *nods *

Raven, visibly upset : Well trust me, when I get my hands on him I'll stop having one.