Let's display the
first letter of the
string hello:
In Ruby, the first position
is 0 and not 1.
So, we start counting from 0.
The first letter is
at position 0. The second letter
is at position 1.
Computer science people call
it index rather than calling
it position.
So, we can say that the first
letter is at index 0. The second
letter is at index 1 and so on.
| String | h | e | l | l | o |
| Index | 0 | 1 | 2 | 3 | 4 |
Similarly, if we want the
3rd letter, then we need to
use value 2.
Let's see one more example:
| String | c | h | i | c | a | g | o |
| Index | 0 | 1 | 2 | 3 | 4 | 5 | 6 |