Code Name Version      Release Date

• No codename 1.0.      23-Sep-08

• Petit Four 1.1             9-Feb-09

• Cupcake 1.5               27-Apr-09

• Donut 1.6                  15-Sep-09

• Eclair 2.0 – 2.1          26-Oct-09

• Froyo 2.2 – 2.2.3       20-May-10

• Gingerbread 2.3 – 2.3.7   6-Dec-10

• Honeycomb 3.0 – 3.2.6   22-Feb-11

• Ice Cream Sandwich 4.0 – 4.0.4  18-Oct-11

• Jelly Bean 4.1 – 4.3.1      9-Jul-12

• KitKat 4.4 – 4.4.4           31-Oct-13

• Lollipop 5.0 – 5.1.1       12-Nov-14

• Marshmallow 6.0-6.0.1  5-Oct-15

• Nougat 7.0 – 7.1.2        22-Aug-16

• Oreo 8.0                      21-Aug-17

Source -Wikipedia