The sentence in quotes, the value of which is assigned to mim, is a string literal. The value stored in ror has numeric type. The value stored in nen has Boolean type. The value stored in fif has numeric type. Naming Variables JScript is a case-sensitive language, so naming a variable myCounter is different from naming it MYCounter .
Subsequent characters can be letters, numbers, underscores, or dollar signs.
The variable name can't be a reserved word . In instances in which you want to declare a variable and initialize it, but without giving it any particular value, you may assign it a special value, null . At this point, notalot becomes 0. If you declare a variable without assigning any value to it, it exists but is undefined . Places the value NaN in waitingFor as godot is undefined.