How to turn My Wi-Fi Back on my iPhone?

When I go on to settings, then Wi-Fi, My Wi-Fi is stuck on off the slider is stuck on off and I can't slide back on to 'On'
It also says 'Location Accuracy is improved when Wi-Fi is turned on'
How Can Get My Wi-Fi to Work Again?

First reboot your cell, or just pull the battery out. And see if that works. If not try removing the router then search again. Sometimes a reboot will fix thongs. Especially if you leave you cell on all night