Shell Programming and Scripting

#!/bin/bash
echo "Enter file name"
read file
cat $file
echo "Enter the number"
read n
head $n  $file | sort -n -r >> file2
echo "biggest no is " 
head -1 file2

Enter file name
myfile
260
10
10
250
100
1
1
1
1
2
1
3
4
5
8
2.7
44
4
3
4
4
5
5
7
100
10
03
25
200
160
300
6000          
Enter the number
-10

biggest no is
260

#!/bin/bash
echo "Enter file name"
read file
echo "Enter the number"
read n
awk -v count=$n '{k = $1; getline; for (j=1; j<cunt; j++) {if ( $1 > k ) k = $1; getline; } print k}' $file

#!/bin/bash

echo "Enter file name"
read file

echo "Enter the number"
read n

awk -v count=$n '{k = $1; getline; for (j=1; j<cunt; j++) {if ( $1 > k ) k = $1; getline; } print k}' $file

-v count=$n

'{k = $1; getline; for (j=1; j<cunt; j++) {if ( $1 > k ) k = $1; getline; } print k}'

#!/bin/bash

echo "Enter file name"
read file

echo "Enter the number"
read n

awk -v count=$n '{k = $1; getline; for (j=1; j<count; j++) {if ( $1 > k ) k = $1; getline; } print k}' $file

-v count=$n

'{k = $1; getline; for (j=1; j<count; j++) {if ( $1 > k ) k = $1; getline; } print k}'

For every line
  set k to the first value of the current input line
  Get the next input line
  For j starting at 1, until j = count do the following
    If the new value is greater than k, set k to the new higher value
    get the next line
  End For j loop
  Print the high value for the set of lines
End For every line loop

$file

6
3
0.33
6
5
100
2
12.3
6
12
54
1000
5
16
16
67
67

enter file name
myfile

enter the number
3

count1
biggest no is 6

count2
biggest no is 100

count3
biggest no is 12.3

count4
biggest no is 1000

count5
biggest no is 16

count6
biggest no is 67


final count is 6

enter file name
myfile

enter the number
3
6
0.33
5
2
6
54
5