Condition loop in python

Question

Check indentation error:

#condition loop
marks = input("marks: ")
if(marks >= 90):
print("A")
elif(marks >= 80 and marks < 90):
print("B")
elif(marks >= 70 and marks < 80):
print("C")
else:
print("D")

Answer 1

The if statement should not be indented .

The elif should align with the if.

The print statements should be indented.

#condition loop
marks = input("marks: ")
if(marks >= 90):
print("A")
elif(marks >= 80 and marks < 90):
print("B")
elif(marks >= 70 and marks < 80):
print("C")
else:
print("D")

Answer 2

Prakash Kumar Jaiswal ,

> i am not sure how far you have progressed with the 'introduction to python' tutorial, but many of the issues you are encountering are covered in that tutorial."

so i would recommend to continue with this course.

please also practice what you have learned.

>> another issue is the data type of the input, which is a string, and how it is used in the conditional statements. this causes a `TypeError`. to avoid this, we need to convert the input values to integers.

Answer 3

Jerry Hobby ,
Thanks a lot sir !😊👍
But there is data type problem which might be solved by converting the input to int(input ()).

Answer 4

Lothar ,
Thanks for your valuable advice, Mr Lothar, I am counting on you 🙏😊

Answer 5

Hi Prakash Kumar Jaiswal,

In Python, it’s generally not necessary to use parentheses in the condition of compound statements, like this:

elif(marks >= 70 and marks < 80):
...

Instead, you can write it without parentheses, like this:

elif marks >= 70 and marks < 80:
...

If you still want to use parentheses for clarity, you can write it like this, but it’s optional:

elif (marks >= 70) and (marks < 80):
...

Also, you can simplify the expression by using a more Pythonic approach, which makes the code easier to read:

elif 70 <= marks < 80:
...

This method takes advantage of Python’s ability to chain comparisons, which can make your code cleaner and more concise.