Create a program that outputs a letter grade for a student based on the following table: 

From To Grade 
90 100 A 
80 89 B 
70 79 C 
0 69 F 

I don't understand how to do this. Would you mind helping me get the answer to this Program?

Of course! I would be happy to help you with this program.

To solve this problem, you can use conditional statements in your programming language of choice. Here's a step-by-step guide on how to create the program:

1. Take input from the user for the student's score.
2. Create a set of conditional statements (if-else or switch-case) to compare the input score with the given grade ranges.
3. Within each conditional statement, set the appropriate letter grade as the output based on the corresponding range.
4. If the input score does not fall within any of the given ranges, assign the grade 'F' as the default output.
5. Print the letter grade as the final output.

Here's a Python example to illustrate the solution:

```python
# Step 1: Take input from the user
score = int(input("Enter student's score: "))

# Step 2-4: Set letter grade based on score
if score >= 90 and score <= 100:
grade = 'A'
elif score >= 80 and score <= 89:
grade = 'B'
elif score >= 70 and score <= 79:
grade = 'C'
else:
grade = 'F'

# Step 5: Print the letter grade
print("The student's grade is", grade)
```

In this example, the program first prompts the user to enter the student's score. Then, using conditional statements, it compares the score against the given ranges to determine the letter grade. Finally, the program prints the calculated grade.

You can modify the above example to fit your preferred programming language if you're not using Python. Just make sure to adapt the syntax accordingly.