This is phython coding program, I do not know what wrong in this..please tell me if you find any error or new trick to find a cube root...

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cube=int(input(' enter a vlue to find it cube root,(vlue must be >1):'))
epsilon=0.01
num_guess=0
low=0
high=cube
guess=(high+low)/2.0
while abs(guess**3-cube)>=epsilon:
	if guess**3<cube:
			low=guess
	else:	#guess**3>=guess
		high=guess
		guess=(high+low)/2.0
		num_guess+1
		if(high==low):
			guess=low      #or it =high 
			break

print('number of guess=',num_guess)
print(guess)

What I have tried:

when i run it it give no respond it also cant give a arror...

example after run this program:

enter a vlue to find it cube root,(vlue must be >1):9

#its give nothing

Posted 27-Feb-18 16:44pm

Member 13700405

Updated 27-Feb-18 21:35pm

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Patrice T · Answer 1 · 2018-02-27T17:07:00

With Python, indentation is the structure of your program, pay extra care to it.
Use the debugger and execute line by line, you will see what is wrong.

There is a tool that allow you to see what your code is doing, its name is debugger. It is also a great learning tool because it show you reality and you can see which expectation match reality.
When you don't understand what your code is doing or why it does what it does, the answer is debugger.
Use the debugger to see what your code is doing. Just set a breakpoint and see your code performing, the debugger allow you to execute lines 1 by 1 and to inspect variables as it execute.

Debugger - Wikipedia, the free encyclopedia[^]

Mastering Debugging in Visual Studio 2010 - A Beginner's Guide[^]
Basic Debugging with Visual Studio 2010 - YouTube[^]
27.3. pdb — The Python Debugger — Python 3.6.1 documentation[^]
Debugging in Python | Python Conquers The Universe[^]
pdb – Interactive Debugger - Python Module of the Week[^]
The debugger is here to show you what your code is doing and your task is to compare with what it should do.
There is no magic in the debugger, it don't find bugs, it just help you to. When the code don't do what is expected, you are close to a bug.

Richard MacCutchan · Answer 2 · 2018-02-27T21:36:00

Solution 2

Python

num_guess+1 # this is wrong, it does nothing

num_guess += 1  # this is correct, add 1 to num_guess

Posted 27-Feb-18 21:36pm

Richard MacCutchan