My car won't crank. Has plenty of power. Any thoughts?

No crank no start. Shut it off to get some food. Went back to everything lighting up as normal but no crank no start.

if you have 12.6 volts on the battery,then with test light or volt meter,with helper,check the small wire going to the starter for signal from ignition switch to crank while helper is trying to crank it.also check all connections,battery,starter,grounds for corrosion and tight,disconnected.