Which of the following is an invalid statement?
A) numbers = 1,000,000
B) numbers = 1000 2000 3000
C) numbers = 1000, 2000, 3000
D) numbers = 1,000,000
Answer: B) numbers = 1000 2000 3000
Whitespace is not allowed in a variable names. If we write number one as a variable name it will be an invalid while using an _ character between two words makes it a valid variable name. for example number_one is a valid variable name.