I have a list numbers with set values. For instance:

0 = 123
1 = 456
2 = 789

If I enter a 0 into cell A1, I want 123 to automatically be entered into B1;
If I enter a 1 into cell A1, I want 456 to automatically be entered into B1;
If I enter a 2 into cell A1, I want 789 to automataically be entered into B1

Thanks for your help!
DiDi