Check if a command exists in linux

checkcmd.sh

#!/bin/bash

if [ $# -eq 0 ]; then
  printf "Please specify the command to check for.\n"
  printf "Example:\n"
  printf "$ ./checkcmd.sh docker\n"
else
  if sudo command -v $1 >/dev/null 2>&1; then
    printf "Yay! $1 exists.\n"
  else
    printf "Noo! $1 is not available.\n"
  fi
fi