checking if a value is np.nan code example

Example 1: check nan values in a np array

array_has_nan = np.isnan(array_sum)

Example 2: check if var is NaN

let b=1
let n=readline()
if(isNaN(b)){
  console.log("You typed 0!")
}else{
  console.log("You did not type 0!")
}