Consider this input code to find half of the number that you input:
>>> a = int(input("Please input a number: "))
Please input a number: 4
>>> if(a/2 == a/2):
... a/=2
... print("Half of the number than you input is:",a)
...
Half of the number than you input is: 2.0
When I input it, it was a int, but why has it changed from int to float? Note: If I enter numbers that requires to print out decimal points such as 5, it will print 2.5.
Unlike other languages, Python3 does not keep the result of int/int as an int. Python3 always returns a float.
You need to use the integer division operator (// or //=)
What is the difference between '/' and '//' when used for division?
Why does integer division yield a float instead of another integer?
I will keep the previous answer below
If you would like to cast "integer like" decimals, use is_integer:
a = int(input("Please input a number: "))
a /= 2
if a.is_integer():
a = int(a)
print(a)
is_integer
Return True if the float instance is finite with integral value, and False otherwise:
Test table:
| Input | Output | type() |
|---|---|---|
0 |
0 |
<class 'int'> |
1 |
0.5 |
<class 'float'> |
2 |
1 |
<class 'int'> |
-1 |
-0.5 |
<class 'float'> |
-2 |
-1 |
<class 'int'> |
0 |
0 |
<class 'int'> |
1.0 |
0.5 |
<class 'float'> |
2.0 |
1 |
<class 'int'> |
-1.0 |
-0.5 |
<class 'float'> |
123 |
61.5 |
<class 'float'> |
(a and b) or c which is equivalent to ((a and b) or c)
float