How much weight could I lose (in a few weeks) by eating mostly vegan diet?Mainly veggies?

I'm 5'9" and I weight about 155.I would like to lose some weight and eat healthier in general. I've just started running (when at the gym).So,how much weight do you think I could lose through mostly veggies and running daily?
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+1 y
Maybe I should have specified this,but I am well aware of needing protein to build muscles and needed healthy carbs because obviously I would need energy to actually work out.
How much weight could I lose (in a few weeks) by eating mostly vegan diet?Mainly veggies?
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