Fibonacci Series using for loop in Swift. Fibonacci is a series of numbers in which each number is the sum of the two preceding numbers. This program prints the first 10 numbers in the Fibonacci Series.

var x = -1 ,y = 1, sum = 0; for i in 0..<10 { sum = x+y; x = y; y = sum; print(sum); }

0 1 1 2 3 5 8 13 21 34

Initially assign -1 to `x`

and 1 to `y`

.

Now iterate from 0 to 10.

Add the `x`

and `y`

values and assign it to the `sum`

Replace the value of `x`

by `y`

and `y`

by `sum`

. Hence the Fibonacci Series can be done with the help of for loop.

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