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20 lines
306 B
20 lines
306 B
package main
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import "fmt"
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// fib returns a function that returns
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// successive Fibonacci numbers.
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func fib() func() int {
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a, b := 0, 1
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return func() int {
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a, b = b, a+b
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return a
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}
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}
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func main() {
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f := fib()
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// Function calls are evaluated left-to-right.
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fmt.Println(f(), f(), f(), f(), f())
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}
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