Linux command (like cat) to read a specified quantity of characters

Question

Is there a command like cat in linux which can return a specified quantity of characters from a file?

e.g., I have a text file like:

Hel         


        

Answer 1

head -Line_number file_name | tail -1 |cut -c Num_of_chars

this script gives the exact number of characters from the specific line and location, e.g.:

head -5 tst.txt | tail -1 |cut -c 5-8

gives the chars in line 5 and chars 5 to 8 of line 5,

Note: tail -1 is used to select the last line displayed by the head.