i am trying to program a code for file backup using linux CLI bash shell but i keep getting a syntax error near unexpected token then' , if[$? -eq 0 ]; then ‘

#!/bin/bash

# Define source and destination directories

sourceDir="/path/to/source"
destinationDir="/path/to/backup"

# Create timestamp for backup folder
backupFolder=$(date +"%Y-%m-%d_%H-%M-%S")

# Create backup directory if it doesn't exist
if [ ! -d "$destinationDir/$backupFolder" ]; then
    mkdir -p "$destinationDir/$backupFolder"
fi

# Copy files from source to destination
cp -r "$sourceDir" "$destinationDir/$backupFolder"

# Check if backup was successful
if [ $? -eq 0 ]; then
    echo "Backup completed successfully. Files are stored in $destinationDir/$backupFolder"
else
    echo "Backup failed. Please check your source and destination directories."
fi

i have tried deleting the space between “]; then”