Please check the script errors

I would like to ask you to check the Script Error-general Linux technology-Linux technology and application information. The following is a detailed description. The following are two scripts for batch addition and deletion of users. I hope you can see what went wrong.
#! /Bin/bash
I = 1
Read-p "Enter the number of users you want to create:"
Read-p "Enter the username Prefix:" B
Read-p "Enter the user expiration time:" C
Read-p "Enter your initial password:" D
While [$ I-le $ A]
DO
If [$ I-lt 10]; then
USE = $ B0 $ I # Here 0 is a number
Else
USE = $ B $ I
If
Useradd-e $ C $ USE
Echo "$ D" | passwd -- stdin $ USE &>/dev/null
Let I ++
Done
The above is the add user. The following two scripts correspond to each other to the delete user.
#! /Bin/bash
I = 1
Read-p "Enter the username prefix you want to delete in batches:"
Read-p "Enter the number of users you want to delete:" B
While [$ I-eq $ B]
Do
If [$ I-lt 10]; then
USE =$ {A} 0 $ I
Else
USE = $ A $ I
Fi
Userdel-d $ USE | grep-v "root"/etc/passwd | cut-d "root"
Let I ++
Done
The above script has errors. I hope the prawns can help me with the dishes ~~!