60 lines
969 B
Go
60 lines
969 B
Go
// File: iteration.go
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// Created Time: 2023-08-28
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// Author: Reanon (793584285@qq.com)
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package chapter_computational_complexity
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import "fmt"
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/* for loop */
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func forLoop(n int) int {
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res := 0
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// Loop sum 1, 2, ..., n-1, n
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for i := 1; i <= n; i++ {
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res += i
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}
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return res
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}
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/* while loop */
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func whileLoop(n int) int {
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res := 0
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// Initialize condition variable
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i := 1
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// Loop sum 1, 2, ..., n-1, n
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for i <= n {
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res += i
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// Update condition variable
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i++
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}
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return res
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}
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/* while loop (two updates) */
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func whileLoopII(n int) int {
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res := 0
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// Initialize condition variable
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i := 1
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// Loop sum 1, 4, 10, ...
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for i <= n {
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res += i
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// Update condition variable
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i++
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i *= 2
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}
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return res
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}
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/* Double for loop */
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func nestedForLoop(n int) string {
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res := ""
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// Loop i = 1, 2, ..., n-1, n
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for i := 1; i <= n; i++ {
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for j := 1; j <= n; j++ {
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// Loop j = 1, 2, ..., n-1, n
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res += fmt.Sprintf("(%d, %d), ", i, j)
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}
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}
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return res
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}
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