Facing problem in some places

Question

I have inserted the code, and added the Problems as #comment. Check it
and make the corrections.
https://code.sololearn.com/cE8d7gvX0hCY/?ref=app

Answer 1

1. quit operation doesn't work because you convert user input to float. It will be an error if you convert string 'quit' to floating point number.
Store user input as string, check it for 'quit' and then convert it to a float:
#.....
num_1 = input('Enter a number')
num_2 = input('Enter another number')
user_input = input('Enter +/-/*/÷/^/sqrt: ')
if user_input == 'quit' or num_1 == 'quit' or num_2 == 'quit':
break
num_1 = float(num_1)
num_2 = float(num_2)
if user_input == '+':
#.....

2. power and sqrt don't work because condition on line #27 is always evaluated as true. It should be:
elif user_input == '÷' or user_input == '/':

3.
sqrt(num_1 and num_2) -
the result will be sqrt(num_2) if num_1 is not zero, otherwize 0.
You can't take square root of two numbers.
Here should be your decision what to do with two numbers (take sqrt of both numbers separately or ignore num_2...)

Answer 2

I fixed the errors and slightly modified your code:
https://code.sololearn.com/cWtKAZu3u1yj

Answer 3

Did you mean {} brackets?
It's placeholder. format() method replaces it with its argument which is 'result'.

Read about output formatting.
https://docs.python.org/3/tutorial/inputoutput.html

Answer 4

Thanx alot. Now its working fine. But what is the function of 2nd bracket in result?

Answer 5

Please make correction to hole code, its a humble request to you sir/mam.
I am a beginner and I would like to learn from your corrected code.