Shell Programming and Scripting

$ filename="something.order"
$ if [[ -e $filenwme ]]
> then
> echo "R. Singh"
> else
> echo "nothing"
> fi

#!/bin/bash
filename="*.order"
if [[ -e $filename ]]
then
echo "yes its there"
else
echo "no its not"
fi

if [ -n "$(ls | grep "[.]order$")" ]
then
   echo found
else
   echo not found
fi

if [ -n "$(ls *.bin  2>/dev/null)" ];then 
  echo "Okk..."
else
  echo "Oops"
fi

#!/bin/bash
files=( *.order )

if (( "${#files[@]}" > 0 )); then
  ...
else
  ...
fi

for file in "${files[@]}"; do
  something with $file
done

exists () {
  [ -e "$1" ]
}

filename=*.order 
if exists $filename; then
  echo yes
fi

filename=*.order 
if ls $filename >/dev/null 2>&1; then 
  echo hello
fi