In computer programs, variables are often declared without a value. The value can be something that has to be calculated, or something that will be provided later, like user input. A variable declared without a value will have the value undefined. The variable carName will have the value undefined after the execution of this statement:
If you re-declare a JavaScript variable, it will not lose its value. The variable carName will still have the value "Volvo" after the execution of these statements:
