s = 'this is a string'

s1 = 'this is '

s2 = 'a string'

stot = [s1,s2]

stot(1)='T'

stot = [stot,'!']
>> string_manipulations

s =

    'this is a string'


s1 =

    'this is '


s2 =

    'a string'


stot =

    'this is a string'


stot =

    'This is a string'


stot =

    'This is a string!'

>>