js check if string is number
isNaN(num) // returns true if the variable does NOT contain a valid number
isNaN(123) // false
isNaN('123') // false
isNaN('1e10000') // false (This translates to Infinity, which is a number)
isNaN('foo') // true
isNaN('10px') // truecheck if string is empty python
my_str = ""
if not my_str:
print("empty")
else:
print("not empty")
#output: emptyCopyright © 2021 Codeinu
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