Explanation and result of the following Python program.

Question

1.00/5 (1 vote)

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Python

x = 5
if 8 % 4:
    x = x - 1
elif 3 < 4 / 2:
    x = x - 2
elif "t":
    x = x - 3
else:
    x = x - 4
print (x)

What I have tried:

I think of the result is 1 but the result is 2.
I do not understand the meaning of below statements:

Python

elif 3 < 4 / 2:
    x = x - 2

Posted 9-Sep-17 10:49am

Abhinandan Sharma

Updated 1-Jan-21 15:58pm

Patrice T

v2

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Patrice T · Accepted Answer · 2017-09-09T11:23:00

Quote:
I do not understand the meaning of below statements:

Python
elif 3 < 4 / 2:
    x = x - 2

Is it better like that ?

Python

elif 3 < (4 / 2):
    x = x - 2

Read about "operator precedence" to understand how expressions works.

Use debugger to see what this code is doing and how the answer is built.

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[^]
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.