Why my hyundai grand i10 engine not starting

if press engine start stop button, engine is not starting , battery seems quite ok

Actually there was a typing mistake while the question was set forth hoping that people conversant with these sorts of technical snag can easily make out what i really mean.

if press engine start stop button, engine is not starting , battery seems quite ok should read as "if i press start stop button,engine is not starting, battery seems quite ok"

sorry for the trouble

And for the benefit of all stakeholders , the problem was with the device "Self" having deposited lots of carbon in it even though car was hardly 2 years old, The device "self" cleaned/repaired and is working nicely.