Practice Conditionals

Build a program that uses an if block with multiple elseif blocks to output a letter grade for a given score that is between 1 and 100. Then use the following information to determine the letter grade for the score.

90-100: A
80-89: B
70-79: C
60-69: D
Below 60: F

In this problem, a score of 78 should output the letter grade, C. Change the score to test all of the different program outputs.