Using std::find_if with std::vector to find smallest element greater than some value

I have a vector of doubles which are ordered.

std::vector<double> vec;
for(double x{0.0}; x < 10.0 + 0.5; x += 1.0) vec.push_back(x);

I am trying to use std::find_if to find the first element, and its corresponding index, of this vector for which y < element. Where y is some value.

For example, if y = 5.5 then the relevant element is element 6.0 which has index 6, and is the 7th element.

I suspect that a lambda function could be used do to this.

• Can a lambda function be used to do this?

• If so, how do I implement a find_if statement to do what I want?