def streql(s1, s2):
 if (len(s1) != len(s2)):
  return False
 b = True
 for (ch1, ch2) in zip(s1, s2):
  if (ch1 != ch2):
   b = False
 return b

def streql ( s1 , s2 ) : if ( len ( s1 ) != len ( s2 ) ) : return False b = True for ( ch1 , ch2 ) in zip ( s1 , s2 ) : if ( ch1 != ch2 ) : b = False return b
returns true if the given strings are identical .