As others have pointed out, there is no age limit, and the learning never stops. But like anything else, you can take it as far as you want to go - just around

As others have pointed out, there is no age limit, and the learning never stops. But like anything else, you can take it as far as you want to go - just around the block or the rest of your life. Just start and see what happens. Even if you end up writing just the simplest "hello world" program and decide to never go any further, you will have learned something most people have no clue about and will at least begin to understand the potential of what is possible.