2 If else

# only if
echo enter a number
read x
if [[ $x -gt 10 ]] #if [[ $x -gt 0] ]
then
  echo number greter then 10
fi

# Output
enter a number
12
number greter then 10



# If with else
echo enter a number
read x
if [[ $x -gt 10 ]] #if [[ $x -gt 0] ]
then
    echo number greter then 10
else
    echo what is physics
fi

# Output
enter a number
5
what is physics


# with else if
echo enter a number
read x
if [[ $x -lt 0 ]]
then
    echo number is negative
elif [[ $x -gt 0 ]]
then
    echo number is positive
elif [[ $x -eq 0 ]]
then
    echo number is zero
else
    echo you entered something \else
fi

# Output
enter a number
-21
number is negative