awk 'NR>=2 {print NR " - " $0}' mary.txt

$ cat mary.txt 
Mary had a little lamb
Little lamb little lamb
Mary had a little lamb
Whose fleece was white as snow


$ cat skipfirstline.awk
NR>=2 {print NR " - " $0}

awk -f skipfirstline.awk mary.txt

$ cat presidents-by-height.tsv
tallest	prs nbr	Name	Hgt in Inches	Hgt in Centimeters
1	16	Abraham Lincoln	6 ft 4 in	193 cm 
2	36	Lyndon B. Johnson	6 ft 3 1⁄2 in	192 cm 
3	45	Donald Trump	6 ft 3 in	191 cm
4	3	Thomas Jefferson	6 ft 2 1⁄2 in	189 cm 
5	1	George Washington	6 ft 2 in	188 cm
5	21	Chester A. Arthur	6 ft 2 in	188 cm
5	32	Franklin D. Roosevelt	6 ft 2 in	188 cm
5	41	George H. W. Bush	6 ft 2 in	188 cm
5	42	Bill Clinton	6 ft 2 in	188 cm
10	7	Andrew Jackson	6 ft 1 in	185 cm
10	35	John F. Kennedy	6 ft 1 in	185 cm 
10	40	Ronald Reagan	6 ft 1 in	185 cm 
10	44	Barack Obama	6 ft 1 in	185 cm


awk -F "\t" -f presidents.awk presidents-by-height.tsv


$ cat presidents.awk 
{
  if (length($3) <= 8) 
      print $1 "\t" $2 "\t\t" $3 "\t\t\t" $4 "\t" $5 "\t" $6  
  else if (length($3) <= 15) 
      print $1 "\t" $2 "\t\t" $3 "\t\t" $4 "\t" $5 "\t" $6  
  else 
      print $1 "\t" $2 "\t\t" $3 "\t" $4 "\t" $5 "\t" $6  
}

awk -F "\t" -f presidents-printf.awk presidents-by-height.tsv

$ cat presidents-printf.awk 
{
      printf "%-8s %-8s %-23s %-14s %-8s \n", $1, $2, $3, $4, $5	
}

$ cat grades.txt 
Jamie,92,78,95,82,100
Dana,91,88,92,87,93
Danny,89,92,84,97,91
Alex,85,74,85,100,78
Charlie,93,84,78,92,87
Tatum,95,93,72,100,92
Jordan,78,94,81,84,100
Shae,82,85,91,78,100
Payton,92,73,80,92,100
Riley,89,89,97,91,81
Terry,85,92,97,87,93

awk -f findavg.awk grades.txt

$ cat findavg.awk 
BEGIN { FS=",";
        hdr_line="Name ";

        for (i=1; i<=5; i++ ) {
            hdr_line = hdr_line "\ttest" i ;
        }
 
        hdr_line = hdr_line "\t\tavg";

        print " ";
        print hdr_line;
        print "------ \t------\t------\t------\t------\t------\t\t----";
}
{
       main_line=$1;
       std_test_tot=0;

       for ( i=2; i<=6; i++ ) {
              main_line = main_line "\t" $i ;
              std_test_tot += $i;
              test_total[i] += $i;
       }

       std_avg = int(std_test_tot / 5);
       class_avg_tot += std_avg;

       print main_line "\t\t"std_avg;
}

END {
      avg_line="Avg\t";

      for ( i=2; i<=6; i++ ) {
           avg_line = avg_line int(test_total[i] / NR) "\t";
      }

      print "------ \t------\t------\t------\t------\t------\t\t----";
      print avg_line "\t" int(class_avg_tot / NR);
      print " ";
}

$ ./rectangle.awk


$ which awk
/usr/bin/awk


$ cat rectangle.awk 
#!/usr/bin/awk -f
# This script will caculate the area of a rectangle

# function area return the height times the width
function area(height,width){
return height*width
}

#function check number - check the value in to see if it is numeric
function chk_numeric(value_in){
if (value_in ~ /^[[:digit:]]/) 
   return 1;
else
   return 0;
}

  # Starts execution
  BEGIN {

  print "Enter the value of height:"
  getline h < "-"

  while ( chk_numeric(h) == 0 ) {
  print "Height must be numeric - Enter the value of height:"
  getline h < "-"
  }


  print "Enter the value of width:"
  getline w < "-"

  while ( chk_numeric(w) == 0 ) {
    print "Width must be numeric - Enter the value of width:"
    getline w < "-"
  }

  print "The area of your rectangle is " area(h,w)
}