Basic constructs ii
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The document discusses Go loops and conditions. It explains that Go only has a for loop with three optional components: an init statement, condition expression, and post statement. It provides an example of a basic for loop that calculates a sum. Go if statements do not require parentheses and the body is within curly braces. Switch statements evaluate cases from top to bottom and can have no condition. The range keyword iterates over elements in arrays, slices, maps and strings.
Basic constructs ii
- 1. Development with Go - Manjitsing K. Valvi
- 2. GO Loops for loop ● Only looping construct ● Three components ○ Init statement : executed at start of loop ○ Condition expression : executed before every iteration ○ Post statement : executed ar end of every iteration ● No parentheses for three conditions, function body inside { } ● Init and post statements are optional
- 3. Go for loops example package main import "fmt" func main() { sum := 0 for i := 0; i < 10; i++ { sum += i } fmt.Println(sum) }
- 4. Go for loops example package main import "fmt" func main() { sum := 1 for ; sum < 10; { sum += sum } fmt.Println(sum) }
- 5. GO Conditions If ● No parentheses for conditions, body inside { } ● Short expression can be used in go, having scope in “if” only ● If can be paired with else as well, else body inside { }
- 6. GO Conditions Switch case ● Evaluates cases from top to bottom ● Switch can have no condition => switch true
- 7. GO iteration range ● iterates over elements in a variety of data structures ● range on arrays and slices provides both the index and value for each entry ● range on map iterates over key/value pairs ● range can also iterate over just the keys of a map ● range on strings iterates over Unicode code points ○ first value is the starting byte index of the rune and the second the rune itself
- 8. References ● “The Way to Go: A Thorough Introduction to the Go Programming Language”, ● https://tour.golang.org/moretypes/ ● https://gobyexample.com/ ●