What is the difference between wc -1 < mydata.dat and wc -1 < mydata.dat ?

What is the difference between

wc -1 < mydata.dat

and

[b]

wc -1 < mydata.dat

?[/b]To output the number of lines in the

mydata.dat

file, we use the

wc -1 mydata.dat

command.By adding

<

to create the command

wc -1 < mydata.dat

, the program opens and reads from the

mydata.dat

file to process the line count. The program sends the contents of

mydata.dat

to

wc

's standard input. This is referred to asredirecting input.

wc -1 < mydata.dat

The output of

wc -1 < mydata.dat

is 48That of

wc -1 < mydata.dat

is

 48 config.dat