Sean Wei => YSITD: $ console.log(1+20*some_var) > ReferenceError: i is not defined [Learn More] $ console.log(1+20*undefined)

Sean Wei says to YSITD

$ console.log(1+20*some_var) > ReferenceError: i is not defined [Learn More] $ console.log(1+20*undefined) > NaN

at Sat, Jun 18, 2016 9:23 PM