var Address : String = "Hyderabad"
print(Address)
var str = String("India")
print(str)

//finding count
print(Address.count)
print(str.count)

//count 
let addstr = Address + str
//print(addstr)
print(addstr.count)


//append
Address.append(str)
print("After append \(Address)")
print("\n")

//each character
for ch in str{
  print(ch)
}
print("\n")

//reveresed
for cha in "APPLE".reversed(){
  print(cha)
}
print("\n")

//reversed string
for char in str.reversed(){
  print(char)
  
}
print("\n")

//usng terminator
for char in str.reversed(){
  print(char,terminator: " ")
  
}
print("\n")
//separator

for char in str.reversed(){
  print(char,separator: " ")
  
}
print("\n")

//
print(Address.reversed())
print("\n")

//keyword reversed
let results = String(Address.reversed())
print(results)
print("\n")

//knowing empty or not empty
let result =  Address.isEmpty
print(result)
if Address.isEmpty {
  print("isempty")
}else{
  print("not empty")
}

print("\n")

//uppercased
let upper = str.uppercased()
print(upper)
//lowercased
let lower = str.lowercased()
print(lower)