Golang input/output: Difference between revisions
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= Documentation = | |||
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| <code>io/ioutil</code> (read/write) || https://pkg.go.dev/io/ioutil@go1.18.3 | |||
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| <code>io/fs</code> (filesystem) || https://pkg.go.dev/io/fs@go1.18.3 | |||
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</blockquote><!-- Documentation --> | |||
= print = | = print = | ||
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</blockquote><!-- stdin, stdout, stderr --> | </blockquote><!-- stdin, stdout, stderr --> | ||
= Filesystem = | |||
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</blockquote><!-- Filesystem --> | |||
= Networking = | = Networking = | ||
Revision as of 21:21, 6 June 2022
Documentation
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
