Doubt while solving Increasing Decreasing Sequence

#1

please tell what to do now , i am stuck after this!!

#2

please tell me how to fix this

#3

Hey your code is not producing any output
Pls let me know where exactly do you want the help.
Also pls comment your code or explain your logic here

#4

mam , please tell what will be the code to check codition of firstly decreasing and then increasing series