Grade Evaluator

• Create a variable grade with a letter grade.


• Assign any one value from this ('A', 'B', 'C', 'D', 'F').


• Se a switch statement to output a message:
• "Excellent" for 'A'
• "Good" for 'B'
• "Satisfactory" for 'C'
• "Needs improvement" for 'D'
• "Failed" for 'F'
• Include a default case for an invalid grade.