CoffeeScript syntax using multiple variables inside for-loop

Question

What's the equivalent CoffeeScript syntax of the native JS' multiple variables for-loop?

for(var a = 0, b = 0; a < 100; a++, b += 10)
{
  console.log(a, b);
}

Answer 1

Instead of a for construct like JavaScript's, CoffeeScript relies on comprehensions and ranges. From the documentation:

The only low-level loop that CoffeeScript provides is the while loop.

You could do something involving a range for a, with b being updated manually:

b = 0
for a in [0..99]
  console.log a b
  b += 10

Or use that while:

a = 0
b = 0
while a < 100
  console.log a b
  ++a
  b += 10