# What is the limit of f(x)=4 as x approaches pi?

The given function is a constant, meaning that for every value of $x$ the result is the same value. In this example that result is $4$ regardless the value of $x$.
If you were to graph $f \left(x\right) = 4$ you would see a horizontal line that intersects the $y$-axis at position $\left(0 , 4\right)$.