Generating consecutive numbered urls

Question

I want to generate a text file containing the folowing lines:

http://example.com/file1.pdf
http://example.com/file2.pdf
http://example.com/file3.pdf
.
.
http://example.com/file1000.pdf

Can any one advise how to do it using unix command line, please?

Thank you

Answer 1

With an interating for loop

for (( i=1;i<=1000;i++ ));
do 
    echo "http://example.com/file$i.pdf";
done > newfile

With seq:

while read i;
do 
   echo "http://example.com/file$i.pdf";
done <<< $(seq 1000) > newfile