Command to calculate number of rows in a file

Sometimes there are so many files and you want to count number of rows in each file the a command or a shell script is handy to get it done otherwise its almost impossible to count number of rows in file. Following are some ways to calculate this.

1. wc -l *.csv (This command will count rows per csv file)
2. #!/bin/bash
   rows=0;
   for f in `*.CSV`;
     do
       let rows+=`wc $f | awk '{print $1}'`
   
     done
   
   echo "Total rows=$rows"

I hope this small tutorial is of help to you guys.