Linked-List-Cycle.go

package linkedlistcycle

type ListNode struct {
	Val  int
	Next *ListNode
}

func HasCycle(head *ListNode) bool {
	fast := head
	slow := head
	for slow != nil && fast != nil && fast.Next != nil {
		fast = fast.Next.Next
		slow = slow.Next
		if slow == fast {
			return true
		}
	}
	return false
}