for...in doesn't seem to execute the body

Executing the following program:

ask {
    let mySum:float = 0
    for(let index in itemPrices) {
        const price = itemPrices:at(index)
        mySum = mySum:plus(price)
    }
    mySum
}

should lead to an error as itemPrices does not exist and is not defined as resource or value either. Instead, this program returns 0.

[czerwinskilukasz1]

Following our chat, this is how it should work for a string:

const word = 'Hello';
for(const index in word) {
 log(index);
}

[mhagmajer]

Same as for-of. This should also work for strings I think