# ### casts = Number The> (int a float BOOL Complex) var1 = 13 is var2 = 99.99 var3 = True var3_1 = False var4. 4 + = 1J var5 = "123321" var6 = "Hello 123" # cast data to an integer int (int float Boolean pure numeric string) # int RES = int (var2) Print (RES) # True 1 False strong strong rotation is transferred integer is the integer 0 RES = int (var3) RES = int (var3_1) Print (RES) RES = int (var5) Print (RES, type (RES)) # RES = int (var6): error # Print (RES, type (RES)): error # a float (whole float Boolean type purely numeric string) RES = a float (var1) RES = a float (var3) # .0 plus decimal become res = float (var3_1) # 0.0 RES = float # (var4) Convert For Complex # CAN not to float RES = float (var5) # 123,321.0 Print (RES) # Complex (int float boolean pure numeric string plural) RES = Complex (var1) # 13 is + 0j RES = Complex (var2) # (99.99 + 0j) RES = Complex (var3) # (. 1 + 0j) RES = Complex (var3_1) # 0j RES = Complex (var5) # (123321 + 0j) Print (RES ) # BOOL (data container types / Number of data types are either True or False) RES = BOOL (var6) RES = BOOL (var4) RES = BOOL ([l, 2,3]) Print ( "<!!! > ") Print (RES) " "" ***** five stars ***** Boolean false ten cases: 0, 0.0, false, 0j, "", [], (), the SET (), {}, None None representation system is a key blank, nothing, to do the initial value is generally "" " res = None Print (RES, of the type (RES))