NAME
     printf -- formatted output

SYNOPSIS
     printf format [arguments ...]

DESCRIPTION
     The printf utility formats and prints its arguments, after   
the first, under control of the format.  The format is a character  string which contains three types of objects: plain characters,   
which are simply copied to standard output, character escape   
sequences which are converted and copied to the standard   
output, and format specifications, each of which causes printing   
of the next successive argument.

     The arguments after the first are treated as strings if the   
corresponding format is either c, b or s;otherwise it is evaluated   
as a C constant, with the following extensions:

o   A leading plus or minus sign is allowed.
o   If the leading character is a single or double quote, the value is the ASCII code of the next character.

command_name option argument

NAME
     echo -- write arguments to the standard output

SYNOPSIS
     echo [-n] [string ...]

DESCRIPTION
     The echo utility writes any specified operands, separated by single blank (' ') characters and followed
     by a newline (`\n') character, to the standard output.