Bash shell script if-else statements

#!/bin/bash

#if-else conditional statements

n=100
if [ $n -eq 100 ]
then
  echo "n is 100"
fi

n=99
if [ $n -eq 100 ]
then
  echo "n is 100"
else
          echo "n is not 100"
fi

n=99
if [ $n -eq 100 ]
then
  echo "n is 100"
elif [ $n -gt 100 ]
        then
          echo "n is greater than 100"
else
                  echo "n is less than 100"
fi


n=99
if [ $n -eq 100 ]
then
  echo "n is 100"
else
          if [ $n -gt 100 ]
                then
                    echo "n is greater than 100"
                else
                          echo "n is less than 100"
          fi
fi