var high=1
var width =1
for ( i in 1..100000000) {
width = 1 / high + width
high = 1 / width + high
}
print("width/high="+width/high*2)
var width =1
for ( i in 1..100000000) {
width = 1 / high + width
high = 1 / width + high
}
print("width/high="+width/high*2)