CS2502

error Functions cannot be declared inside other functions.

#What it means

Functions must be declared at the top level of the script, not inside another function (or inside an if or a loop).

#Typical cause

• A helper function written inside the function that uses it.

#How to fix it

Move the inner function out to the top level. It can still be called from the other function.

#Example

//@chartscript 1
indicator("Helpers")
function outer(x) {
    const inner = (y) => y * 2
    return inner(x)
}
plot(outer(close))

Fixed

//@chartscript 1
indicator("Helpers")
const inner = (y) => y * 2
const outer = (x) => inner(x)
plot(outer(close))

#Related

• CS2501 — name calls itself (through path); recursion is not allowed.
• CS3007 — name can only be used at the top level of the script, not inside a condition, loop or function.