I'm assuming the "i" is increment and the "a" is assign, but I could not figure out or find the answer. Also, it looks very similar to the non-standard
The name iota is taken from the programming language APL.
For example, the integer function denoted by
ιproduces a vector of the first N integers when applied to the argument N, …
That funny character is the lower-case Greek letter iota. I typed
ι, U+03B9, “GREEK SMALL LETTER IOTA”, but Unicode actually has a dedicated code point for APL's iota:
⍳ is U+2373, “APL FUNCTIONAL SYMBOL IOTA”.