Golang input/output: Difference between revisions
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| <code>fmt</code> || https://pkg.go.dev/fmt@go1.18.2 | |||
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| <code>io/ioutil</code> (read/write) || https://pkg.go.dev/io/ioutil@go1.18.3 | | <code>io/ioutil</code> (read/write) || https://pkg.go.dev/io/ioutil@go1.18.3 |
Revision as of 21:24, 6 June 2022
Documentation
fmt
https://pkg.go.dev/fmt@go1.18.2 io/ioutil
(read/write)https://pkg.go.dev/io/ioutil@go1.18.3 io/fs
(filesystem)https://pkg.go.dev/io/fs@go1.18.3
Basics
require "fmt" fmt.Println("foo") // print to stdout with newline fmt.Printf("%v", 123) // print formatted string to stdout (no newline) fmt.Fprintf(os.Stdout, "%v", 123) // prints formatted string to writable object (ex. STDOUT, STERR, ..) fmt.Sprintf("%v", 123) // returns formatted string (no newline)Format Syntax
Printf/Sprintf/Fprintf all take format specifiers.
See full docs here, but here's some really useful formats:# general %v # value %T # type # number-bases %b # binary %x # hex %o # octal %d # decimal # number types %i # int %f # float # strings %s # string %q # quoted/escaped go string %c # unicode-char for num
stdin, stdout, stderr
Filesystem
Networking
Sockets
HTTP