iK()

What does ik() do?

iK() will get the element at index K of the array/string inside. If no value is inside i0(), it defaults to x. Essentially, i0() == i0(x)

from ArrayExpressions import arrex
lst = [1, 2, 3, 4, 5]
output = arrex.evaluate(lst, "i0() + i1()")
print(output) # 3

Other Important Information:

Input	Any array or string, defaults to x if nothing is provided
Does it create a new scope?	No
Output	The element at index K
K	Any number within length of x
I	The K Value
Example	i0("Hello")
Example Explanation	This returns 'H' because H is the first element in the string.

sK()

r()