arr = ["apple", "banana", "orange", "kiwi"]

​

# Swap first and last characters of each string

for i in range(len(arr)):

    if len(arr[i]) > 1:  # Check if the string has at least 2 characters

        arr[i] = arr[i][-1] + arr[i][1:-1] + arr[i][0]

​

print(arr)  # Output: ['eappl', 'aananb', 'eorang', 'iwiik']