NaN when trying to set a string to a string.

That's pretty much all the problem is that the title says. I have a playerMurderer string variable and when I try to set it to uppercase(Enemies.name) which is another string variable, it just returns NAN.

Did you somewhere divide by 0 when generating the playerMurderer string?

At first you should look if Enemies.name is really decleared with a string or if it's empty (manual debuggin)

• first log Enemies.name before you use the uppercase
• after that log uppercase(Enemies.name)

maybe its not decleared and because of this it returns a NaN

Enemies.name must be NaN. That also implies it's set to a number when it looks like it ought to be a string.