#!/bin/bash

if ls -d /tmp; then
  echo "Command succeeded: file exists."
fi

if [ -f /etc/hosts ]; then
	echo "/etc/hosts exists"
fi

num=100
if [ "$num" -gt 10 ]; then
  echo "The number is greater than 10."
fi

floatnum=20.34
result=$(echo "$floatnum > 10.5" | bc)
if [ "$result" -eq 1 ]; then
  echo "The number is greater than 10.5"
fi

word="hello"
if [ "$word" = "hello" ]; then
  echo "You typed hello."
fi

sentense="I want to say hello to the world"
regex="say.*hello"
if [[ "$sentense" =~ $regex ]]; then
  echo "Substring found."
fi