In a past lesson we defined variable

Here's another lesson that maps each digit of $\pi$ into a letter using the mapping that 0=A, 1=B, 2=C, ... 26=Z. We've provided a function here called

In this lesson, you can search for such word-codes in $\pi$ using the built in string search function called

`bigpi`

to be the
first 10,000 digits of $\pi$. We then used this to look for digits occurrence in $\pi$.
Here's another lesson that maps each digit of $\pi$ into a letter using the mapping that 0=A, 1=B, 2=C, ... 26=Z. We've provided a function here called

`tonum`

which will convert a search string
of interest into a series of digits. So for example, `tonum("hi")`

would return
78, since "h" is the 7th digits in the alphabet (starting with 0=A), and "i" is the 8th. So
searching for "hi" in $\pi$ would mean to search for the digits "78." Make sense?
In this lesson, you can search for such word-codes in $\pi$ using the built in string search function called

`string.find`

.
string.find(haystack,needle)

Move the mouse over a dotted box for more information.

`string.find`

line to search for `num`

within `bigpi`

.
Type your code here:

See your results here:

This code will not run! How will you fix the

`string.find()`

line to
search for the pattern in variable `num`

within the string `bigpi`

? If your
result is `nil`

, then it means your pattern wasn't found.