Code Explanation:
1. Defining the Class
class Check:
A class named Check is created.
It will contain a method that checks if a number is even.
2. Defining the Method
def even(self, n):
return n if n % 2 == 0 else 0
even() is an instance method that takes one argument n.
It uses a conditional expression (ternary operator):
If n % 2 == 0 → number is even → return n.
Otherwise → return 0.
In simple terms:
Even number → returns itself
Odd number → returns 0
3. Creating an Object
c = Check()
Creates an instance c of the Check class.
This object can now call the even() method.
4. Initializing a Variable
s = 0
A variable s is set to 0.
It will be used to accumulate the sum of even numbers.
5. Loop from 1 to 5
for i in range(1, 6):
s += c.even(i)
The loop runs for i = 1, 2, 3, 4, 5.
Each time, it calls c.even(i) and adds the result to s.
Let’s trace it step-by-step:
Iteration i c.even(i) Calculation s after iteration
1 1 0 (odd) 0 + 0 0
2 2 2 (even) 0 + 2 2
3 3 0 (odd) 2 + 0 2
4 4 4 (even) 2 + 4 6
5 5 0 (odd) 6 + 0 6
6. Printing the Result
print(s)
Prints the final accumulated value of s.
After the loop, s = 6.
Final Output
6
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