Counting characters, words, length of the words and total length in a sentence

Question

I have to write a script that takes a sentence and prints the word count, character count (excluding the spaces), length of each word and the length. I know that there exist

Answer 1

string="i am a string"

n=$(echo $string | wc -w )

echo $n

4

The value of n can be used as an integer in expressions

eg.

echo $((n+1))
5