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Can we update an existing int value in python?

Like lets say for example: x=1 If x<0: x=2 Else: x=4 print(x) Would that output 1 or 4? As i know numbers are immutable in python but I'm not really sure. Thanks in advance !

21st Mar 2022, 9:03 PM
Syrine Ayedi
Syrine Ayedi - avatar
12 Answers
+ 7
Your example was about conditional statements and variable assignment. The fact that numbers are immutable have nothing to do with it. x was assigned to a different value because of the condition you set. here is an interesting discussion related to your question https://stackoverflow.com/questions/62177372/is-integer-immutable-or-mutable
21st Mar 2022, 9:22 PM
Bob_Li
Bob_Li - avatar
+ 3
You can update variables in python. Even in python2 you can do this True = False (Because True will be treated as both variable and boolean and this can break code but just to tell that you can reassign variables)
21st Mar 2022, 9:22 PM
Umar Farooq
+ 3
So basically the thing is the old value never really got erased from the memory and a new int value has been created in another memory location that holds the new value assigned use this code and you'll see: x=5 print(x) print(id(x)) x=12 print(x) print(id(x)) #id prints out the memory location that holds that value FF9900
21st Mar 2022, 10:12 PM
Syrine Ayedi
Syrine Ayedi - avatar
+ 3
Python's internal workings is not something I often think about. I guess I'm just basically a simple utilitarian coder. If it gets the job done, no need to take it apart. But here is another interesting tidbit https://medium.com/@daniel.tooke/will-python-intern-my-string-94ea9efc18b2
21st Mar 2022, 11:01 PM
Bob_Li
Bob_Li - avatar
+ 2
num = lambda x: 2 if x<0 else x+4 print(num(-1)) # or print(num(1))
22nd Mar 2022, 6:29 AM
CodeStory
CodeStory  - avatar
+ 1
Thanks 😊 i was just confused because my friend said that numbers and sequences are immutable in python .
21st Mar 2022, 9:09 PM
Syrine Ayedi
Syrine Ayedi - avatar
+ 1
I've just tried this code: x=5 print(x) x=12 print(x) And the value of x got updated ? Why? It's not in a conditional statement here.
21st Mar 2022, 10:01 PM
Syrine Ayedi
Syrine Ayedi - avatar
+ 1
FF9900 4=5 "abcdef"[4] = "E Yes, these are better examples of imutable.
21st Mar 2022, 10:09 PM
Bob_Li
Bob_Li - avatar
0
Yes, the value of 'x' will get updated. As per the given condition, the 'else' part of if-else statement will get executed, so now the new value of x is 4. You can try it on any python supported IDE.
23rd Mar 2022, 9:31 AM
Abhishek Tiwari
Abhishek Tiwari - avatar
0
Yes, we can update with simple basic code by enabling the values to be of user's choice x=int(input()) print(x)
23rd Mar 2022, 7:02 PM
SRK
- 1
# -*- coding: utf-8 -*- """ Created on Mon Mar 21 20:24:02 2022 """ # -*- coding: utf-8 -*- """ Created on Mon Mar 21 20:18:07 2022 """ #print("Enter Course Code: ") courseCode = input("Enter Course Code: ") #print("Enter Continuous Assessment Mark: ") markCA = float(input("Enter Continuous Assessment Mark: ")) if markCA >= 0 and markCA <= 30: #print("Enter Examination Mark: ") markExam = float(input("Enter Examination Mark: ")) if markExam >= 0 and markExam <= 70: markTotal = markCA + markExam if markTotal >= 70: status = "Pass" grade = "A" if markTotal >= 60: status = "Pass" grade = "B" if markTotal >= 50: status = "Pass" grade = "C" if markTotal >= 40: status = "Pass" grade = "D" if markTotal < 40: status = "Trail" grade = "F" print("\n=============
23rd Mar 2022, 8:54 PM
Haruna Owusu
- 2
How to detect bugs in this code
23rd Mar 2022, 8:54 PM
Haruna Owusu