Problem 3: Add a Grade Column

Problem Description

Write a Python program that creates a DataFrame with a "marks" column, and adds a new "grade" column that shows "Pass" if marks are 40 or above, and "Fail" otherwise.

Input

A DataFrame with a "marks" column.

Output

The DataFrame with the additional "grade" column.

Constraints

• Marks range from 0 to 100.

Example Input

text
{"marks": [55, 30, 80]}

Example Output

text
   marks grade
0     55  Pass
1     30  Fail
2     80  Pass

Concepts Covered

Adding columns, conditional logic on columns, apply() or vectorized conditions.