Will not excercising for 2 days cause weight gain?

Hi,

I use an elliptical machine for 40minutes daily. I am going to college and I am just starting to work weekends, 12hrs on Saturday and Sunday and therefore will be unable to exercise on those days. I was wondering if I will gain weight?

My job consists of walking for 10minutes every hour. And I plan on eating whole wheat pasta for dinner just like I always do.
Will not excercising for 2 days cause weight gain?
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