Saturday 1 June 2024

Python Coding challenge - Day 222 | What is the output of the following Python Code?

 

Code:

my_num = -2 print(5 % my_num)

Solution and Explanation:

In Python, the expression 5 % my_num uses the modulus operator %, which gives the remainder of the division of the left operand by the right operand. Let's break down the specific example:

  1. Define the variable: my_num = -2

    • This assigns the value -2 to the variable my_num.
  2. Modulus operation: 5 % my_num

    • Here, you are performing the modulus operation with 5 and -2.

In Python, the result of a % b is defined as the remainder when a is divided by b, and it has the same sign as the divisor b. The formula to compute the result of a % b is:

π‘Ÿ=π‘Ž(𝑏×floor(π‘Žπ‘))

Where floor is the mathematical floor function, which rounds down to the nearest integer.

Let's apply this to our example:

  • Division: 52=2.5
  • Floor of the division: floor(2.5)=3
  • Multiply the divisor by the floored value: 2×3=6
  • Subtract this value from the dividend: 56=1

So, 5%2 results in -1.

Therefore, the output of the code:

my_num = -2 print(5 % my_num)

will be -1.


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