i went to go to work tonite,i got in my car and went to crank it, it acted like it wanted to crank but didnt, so i turned the key off and went to crank it again......and nothing. it didnt click or act like it wanted to crank or anything. my lights and radio still came on, but it wont do anything

does anyone know what is wrong?
ps-i have cranked it a cple times before, and right
after i cranked it, it would idle good for like a second
then the rpms would drop to 0, and it would shut
off.