In almost all cases, yes. Giving two weeks is considered standard in the working world. That means it will most likely leave your employer with a negative impression if you don’t do it.
One tip that's an absolute must is find time to talk to your boss in person. Set up a meeting with your supervisor before you hand in your letter of resignation.
Read about the 5 tips here, and get 3 written examples. What's your two-week notice story? #quitting #twoweeksnotice