Shell if statement in Solaris

The if Statement of shell under Solaris-general Linux technology-Linux technology and application information. For details, refer to the following section. Create a shell script in the Solaris directory:
#! /Bin/sh
# Ifmkdir
# Parameter is passed as $1 but reassigned to DIRECTORY
DIRECTORY = $1
# Is the string empty ??
If ["$ DIRECTORY" = ""]
Then
Echo "Usage: 'basename $ 0' directory to create"> & 2
Exit 1
Fi

If [! -D $ DIRECTORY]
Then
Echo "The directory does't exist" #14 rows
Echo-n "Create it now? [Y. n]:"
Read ANS
If ["$ ANS" = "y" | "$ ANS" = "Y"]
Then
Echo "creating now"
# Create directory and send all output to/dev/null
Mkdir $ DIRECTORY>/dev/null 2> & 1
If [$? ! = 0]
Then
Echo "Errors creating the directory $ DIRECTORY"> & 2
Exit 1
Fi
Fi
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Run the Script:./ifmkdir. sh kkk
The following error is reported:
./Ifmkdir. sh: if [: not found
./Ifmkdir. sh: syntax error in 14 rows: 'then' unexpected

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