Issue retrieving character from a string variable in Pine Script

Question

I'm trying to retrieve the second character from a string variable:

string myString = "Hello"
string secondChar = myString[1]

However, instead of getting "e," the result is "Hello." What am I doing wrong?

Answer 1

[] in pinescript is called history-referencing operator. It is used to access historical values of a variable.

You can convert your string to an array with the str.split() function and then access the chars with array.get().

//@version=5
indicator("My script", overlay=true)

string myString = "Hello"
myStringArr = str.split(myString, '')
secondChar = array.get(myStringArr, 1)

if (barstate.islast)
    label.new(bar_index, high, secondChar)