is there anyway to increment exponentially in swift?

Question

I am trying to write a for loop, where I have to increment exponentially. I am using stride function but it won\'t work. Here\'s c++ code, I am trying to write a sw

Answer 1

A while-loop is probably the simplest solution, but here is an alternative:

for m in sequence(first: 1, next: { 2 * $0 }).prefix(while: { $0 <= high - low }) {
    print(m)
}

sequence() (lazily) generates the sequence 1, 2, 4, ..., and prefix(while:) limits that sequence to the given range.

A slight advantage of this approach is that m is only declared inside the loop (so that it cannot be used later accidentally), and that is is a constant so that it cannot be inadvertently modified inside the loop.