I got TradingView's 'end of line without continuation' error with Pine Script

Question

I am using this code in Pine Script but getting the "mismatched input 'a' expecting 'end of line without line continuation'" error.

How to fix that error with this function code?

val(s) =>
     if s != s[1] 
     a = s-s[1]
     if s = s[1]
     a
    a

Solution

The 'end of line without continuation' error happens when there's an indentation mistake in the TradingView Pine code.

Looking at your code (and assuming copying it into StackOverflow went right), there is indeed an indentation problem:

val(s) =>
     if s != s[1] 
     a = s-s[1]
     if s = s[1]
     a
    a

There are two indentation problems in this code:

• The first 4 lines of the function are indented with 5 spaces (or 1 Tab plus a space). But code lines of a function need to be indented with 4 spaces (or 1 Tab) in TradingView Pine.
• The two lines that follow after the if statements are not indented. But they do need to be: with 4 spaces (or 1 Tab) or a multiple thereof.

When we fix those two points the code becomes:

val(s) =>
    if s != s[1] 
        a = s-s[1]
    if s == s[1]
        a
    a

(Note that I also replaced the = assignment operator with the == operator for equality here.)

---

The above code also triggers the 'undeclared identifier' error because of the a variable: it is used before it is declared in your function. I wasn't sure if you also wanted that fixed or that the function code you posted is just part of a bigger function.

But if you also want to fix that 'undeclared identifier' error you'd change the function code to:

val(s) =>
    a = 0.0
    if s != s[1] 
        a := s-s[1]
    if s == s[1]
        a
    a