{"id":38,"date":"2025-03-24T03:55:06","date_gmt":"2025-03-24T03:55:06","guid":{"rendered":"https:\/\/techkubo.com\/go\/?p=38"},"modified":"2025-05-26T17:40:46","modified_gmt":"2025-05-26T17:40:46","slug":"go-formatting-verbs","status":"publish","type":"post","link":"https:\/\/techkubo.com\/go\/go-formatting-verbs\/","title":{"rendered":"Go Formatting Verbs"},"content":{"rendered":"\n

When working with the Printf()<\/code> function in Go, you’ll have access to a variety of formatting verbs that allow you to control how data is presented. <\/p>\n\n\n\n

General Formatting Verbs<\/h2>\n\n\n\n

The following are formatting verbs applicable to all kinds of data types:<\/p>\n\n\n\n

Verb<\/th>Description<\/th><\/tr><\/thead>
%v<\/code><\/td>Displays the value in the default format.<\/td><\/tr>
%#v<\/code><\/td>Outputs the value in Go-syntax format (ideal for debugging).<\/td><\/tr>
%T<\/code><\/td>Presents the type of the value.<\/td><\/tr>
%%<\/code><\/td>Prints out a percent sign.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Example Code:<\/strong><\/p>\n\n\n\n

package main\n\nimport ("fmt")\n\nfunc main() {\n    var speed = 120.75\n    var brand = "Ducati"\n\n    fmt.Printf("%v\\n", speed)\n    fmt.Printf("%#v\\n", speed)\n    fmt.Printf("%v%%\\n", speed)\n    fmt.Printf("%T\\n", speed)\n\n    fmt.Printf("%v\\n", brand)\n    fmt.Printf("%#v\\n", brand)\n    fmt.Printf("%T\\n", brand)\n}\n<\/pre><\/div>\n\n\n\n
<\/p>\n\n\n\n
Output:<\/strong><\/p>\n\n\n\n
120.75  \n120.75  \n120.75%  \nfloat64  \nDucati  \n"Ducati"  \nstring  \n<\/pre><\/div>\n\n\n\n
<\/p>\n\n\n\n
Integer Formatting Verbs<\/h2>\n\n\n\n
These formatting verbs work exclusively with integers:<\/p>\n\n\n\n
Verb<\/th>Description<\/th><\/tr><\/thead>
%b<\/code><\/td>Displays the binary representation (base 2).<\/td><\/tr>
%d<\/code><\/td>Shows the decimal representation (base 10).<\/td><\/tr>
%+d<\/code><\/td>Shows the decimal representation including the sign.<\/td><\/tr>
%o<\/code><\/td>Displays the value in octal format (base 8).<\/td><\/tr>
%O<\/code><\/td>Octal format with a leading 0o<\/code>.<\/td><\/tr>
%x<\/code><\/td>Outputs the hexadecimal value (lowercase).<\/td><\/tr>
%X<\/code><\/td>Outputs the hexadecimal value (uppercase).<\/td><\/tr>
%#x<\/code><\/td>Hexadecimal format with a leading 0x<\/code>.<\/td><\/tr>
%4d<\/code><\/td>Pads spaces to make it width 4, right-aligned.<\/td><\/tr>
%-4d<\/code><\/td>Pads spaces to make it width 4, left-aligned.<\/td><\/tr>
%04d<\/code><\/td>Pads zeroes to make it width 4.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Example Code:<\/strong><\/p>\n\n\n\n
package main\n\nimport ("fmt")\n\nfunc main() {\n    var maxSpeed = 150\n\n    fmt.Printf("%b\\n", maxSpeed)\n    fmt.Printf("%d\\n", maxSpeed)\n    fmt.Printf("%+d\\n", maxSpeed)\n    fmt.Printf("%o\\n", maxSpeed)\n    fmt.Printf("%O\\n", maxSpeed)\n    fmt.Printf("%x\\n", maxSpeed)\n    fmt.Printf("%X\\n", maxSpeed)\n    fmt.Printf("%#x\\n", maxSpeed)\n    fmt.Printf("%4d\\n", maxSpeed)\n    fmt.Printf("%-4d\\n", maxSpeed)\n    fmt.Printf("%04d\\n", maxSpeed)\n}\n<\/pre><\/div>\n\n\n\n
<\/p>\n\n\n\n
Output:<\/strong><\/p>\n\n\n\n
10010110  \n150  \n+150  \n226  \n0o226  \n96  \n96  \n0x96  \n 150  \n150   \n0150  \n<\/pre><\/div>\n\n\n\n
<\/p>\n\n\n\n
String Formatting Verbs<\/h2>\n\n\n\n
For string data types, here are the options:<\/p>\n\n\n\n
Verb<\/th>Description<\/th><\/tr><\/thead>
%s<\/code><\/td>Displays the string as it is.<\/td><\/tr>
%q<\/code><\/td>Wraps the string in double quotes.<\/td><\/tr>
%8s<\/code><\/td>Adjusts the width to 8, right-aligned.<\/td><\/tr>
%-8s<\/code><\/td>Adjusts the width to 8, left-aligned.<\/td><\/tr>
%x<\/code><\/td>Converts the string into hexadecimal format.<\/td><\/tr>
% x<\/code><\/td>Converts the string into hexadecimal format with spaces included.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Example Code:<\/strong><\/p>\n\n\n\n
package main\n\nimport ("fmt")\n\nfunc main() {\n    var motorcycleBrand = "Harley"\n\n    fmt.Printf("%s\\n", motorcycleBrand)\n    fmt.Printf("%q\\n", motorcycleBrand)\n    fmt.Printf("%8s\\n", motorcycleBrand)\n    fmt.Printf("%-8s\\n", motorcycleBrand)\n    fmt.Printf("%x\\n", motorcycleBrand)\n    fmt.Printf("% x\\n", motorcycleBrand)\n}\n<\/pre><\/div>\n\n\n\n
<\/p>\n\n\n\n
Output:<\/strong><\/p>\n\n\n\n
Harley  \n"Harley"  \n   Harley  \nHarley   \n4861726c6579  \n48 61 72 6c 65 79  \n<\/pre><\/div>\n\n\n\n
<\/p>\n\n\n\n
Boolean Formatting Verbs<\/h2>\n\n\n\n
Boolean values have a straightforward formatting option:<\/p>\n\n\n\n
Verb<\/th>Description<\/th><\/tr><\/thead>
%t<\/code><\/td>Displays the value as true<\/code> or false<\/code>.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Example Code:<\/strong><\/p>\n\n\n\n
package main\n\nimport ("fmt")\n\nfunc main() {\n    var hasFuel = true\n    var needsService = false\n\n    fmt.Printf("%t\\n", hasFuel)\n    fmt.Printf("%t\\n", needsService)\n}\n<\/pre><\/div>\n\n\n\n
<\/p>\n\n\n\n
Output:<\/strong><\/p>\n\n\n\n
true  \nfalse  \n<\/pre><\/div>\n\n\n\n
<\/p>\n\n\n\n
Float Formatting Verbs<\/strong><\/h2>\n\n\n\n
Here are formatting verbs that deal with floating-point numbers:<\/p>\n\n\n\n
Verb<\/th>Description<\/th><\/tr><\/thead>
%e<\/code><\/td>Shows the number in scientific notation with ‘e’.<\/td><\/tr>
%f<\/code><\/td>Displays the number with a decimal point but without an exponent.<\/td><\/tr>
%.2f<\/code><\/td>Limits the precision to 2 decimal points.<\/td><\/tr>
%6.2f<\/code><\/td>Adjusts the width to 6 and precision to 2.<\/td><\/tr>
%g<\/code><\/td>Uses the exponent only if necessary.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
Example Code:<\/strong><\/p>\n\n\n\n
package main\n\nimport ("fmt")\n\nfunc main() {\n    var mileage = 25.768\n\n    fmt.Printf("%e\\n", mileage)\n    fmt.Printf("%f\\n", mileage)\n    fmt.Printf("%.2f\\n", mileage)\n    fmt.Printf("%6.2f\\n", mileage)\n    fmt.Printf("%g\\n", mileage)\n}\n<\/pre><\/div>\n\n\n\n
<\/p>\n\n\n\n
Output:<\/strong><\/p>\n\n\n\n
2.576800e+01  \n25.768000  \n25.77  \n  25.77  \n25.768  \n<\/pre><\/div>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
When working with the Printf() function in Go, you’ll have access to a variety of formatting verbs that allow you […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-38","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nGo Formatting Verbs - 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