Could someone explain me the output of "str("Hello") == str("World!")" in R. I was expecting "TRUE"

I’m just learning R, and I tried this:
str("Hello") == str("World!")

I was expecting an logical output, like TRUE or FALSE, but instead, it returned this:
chr "Hello" chr "World!" logical(0)

I didn’t understand why, bacause the str() function should print the class and whatever is inside parenthesis…
Could someone help me in understanding this, please?

Many thanks.

Tried: str("Hello") == str("World!")
Expected: "TRUE" or "FALSE"
Reality:
chr "Hello" chr "World!" logical(0)

>Solution :

See the following.

tmp <- str("Hello") 

print(tmp) 

is returning:

chr "Hello"
NULL

So you see that NULL is assigned to tmp. The same is for str("whatever").

So you are calling :

NULL == NULL

That’s obviously logical(0)