wc flags & options

-l, --lines

Print the newline count.

wc -l file.txt

cat file.txt | wc -l

-w, --words

Print the word count.

wc -w file.txt

-c, --bytes

Print the byte count.

wc -c file.txt

-m, --chars

Print the character count.

wc -m file.txt

-L, --max-line-length

Print the length of the longest line.

wc -L file.txt

wc -L *.py