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Exercise 6

Which of the following values are primitive values? Which are objects? Which are neither?

"foo"
3.1415
[ 'a', 'b', 'c' ]
false
foo
function bar() { return "bar"; }
undefined
{ a: 1, b: 2 }

Solution

Primitive Values

"foo"
3.1415
false
undefined

Strings, numbers, booleans, and undefined are all primitive values (as are null, bigints, and symbols).

Objects

[ 'a', 'b', 'c' ] (arrays are objects)
function bar() { return "bar"; } (functions are objects)
{ a: 1, b: 2 }

Neither

foo is an identifier. Identifiers are used to name things that have values, such as variables and functions, but they are not values by themselves. Thus, they are neither primitive values nor objects.

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