Help with insert a value equation in bash script

Shell Programming and Scripting
1

HI All,

I have a script in bash that i want that script will perform action

When the size of a particular folder exceeds the 80%.

Here is an example of script that result is exactly 80% :

#!/bin/bash
CHECK=$(df -h /var/log/syslog | grep '80%' | xargs echo | cut -d' ' -f5)
if [[ "$CHECK" == "80%" ]];
then
"
.

What are the parameters that should be insert to the script that once the

folder size will cross the 80% , ...

Thank you.

2 
df -hP /var/log/syslog | awk 'int($5) >= 80'