# How do I evaluate NIntegrate when one of the bounds is a variable? [duplicate]

I have the function F[x] and I want to plot the integral of it using Plot[NIntegrate[F[n],{n,0,x}],{x,0,5}], but I get the error NIntegrate::inumr. What is going wrong?

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and this, this, and this and many others. –  Sjoerd C. de Vries May 26 '13 at 21:26