1f() { a=A; b=B; } 2 3a=a 4b=b 5f 6echo Expected:AB Actual:$a$b 7 8a=a 9b=b 10b= f 11echo Expected:Ab Actual:$a$b 12 13a=a 14b=b 15a= b= f 16echo Expected:ab Actual:$a$b 17