When driving a manual car do you have to take your foot off the accelerator when changing gears?

When I was taught how to drive a manual car I was told that you're supposed to take your foot off the accelerator when you change gears, is this true?

the reason I ask is because I was recently observing someone driving and when they changed gears they didn't take their foot off of the accelerator.

If you do have to take your foot off, what happens if you leave it on the accelerator while changing gears?When driving a manual car do you have to take your foot off the accelerator when changing gears?
when u change gears u are literally disengaging the transmission fromo the engine power. like in neutral. BUT the clutch is engaged. so if u hold the clutch in a lot, or accelerate while changing gears, the car will jump fwd with more torque (peel out maybe iin 1st, 2nd, 3rd) and the clutch disc will be wasting quicker. so when u are at a red light it's best to put the car in neutral to avoid burning the clutch (happening when you hold the clutch in).When driving a manual car do you have to take your foot off the accelerator when changing gears?
The car jumps into gear.
because there is no load the engine revs up high and then when you go into the next gear it tends to jolt and not be a smooth change, also causes can cause more wear to the clutch as you have to slip it more to get a smoother change.



it might have looked like they didn't take their foot off but they may have had their foot just hovering over the pedal.
when going up through the gears ( first to second, second to third etc, you momentarily lift off the accelerator before changing and before you let the clutch back in, when going down the gears, fifth to fourth, fourth to third, you blip the throttle (increase slightly to help the gears to mesh more easily ) I have driven manuals all my life including commercial, private, agricultural and construction, there is no other way to do it correctly