To determine the number of ways to arrange 4 letters, we can utilize the concept of permutations. When arranging a set number of distinct objects, the formula to find the total number of arrangements is given by the factorial of the number of objects.
For 4 distinct letters, the number of arrangements is calculated as:
4! = 4 × 3 × 2 × 1 = 24
This means there are 24 different ways to arrange 4 distinct letters. Each arrangement is unique, as changing the position of even one letter results in a different arrangement.