https://groups.google.com/group/golang-nuts/msg/71c307e4d73024ce?pli=1
The germane part:
Since integer types use two's complement arithmetic, you can infer the min/max constant values for
intanduint. For example,const MaxUint = ^uint(0) const MinUint = 0 const MaxInt = int(MaxUint >> 1) const MinInt = -MaxInt - 1
As per @CarelZA's comment:
uint8 : 0 to 255
uint16 : 0 to 65535
uint32 : 0 to 4294967295
uint64 : 0 to 18446744073709551615
int8 : -128 to 127
int16 : -32768 to 32767
int32 : -2147483648 to 2147483647
int64 : -9223372036854775808 to 9223372036854775807
Top answer 1 of 13
350
https://groups.google.com/group/golang-nuts/msg/71c307e4d73024ce?pli=1
The germane part:
Since integer types use two's complement arithmetic, you can infer the min/max constant values for
intanduint. For example,const MaxUint = ^uint(0) const MinUint = 0 const MaxInt = int(MaxUint >> 1) const MinInt = -MaxInt - 1
As per @CarelZA's comment:
uint8 : 0 to 255
uint16 : 0 to 65535
uint32 : 0 to 4294967295
uint64 : 0 to 18446744073709551615
int8 : -128 to 127
int16 : -32768 to 32767
int32 : -2147483648 to 2147483647
int64 : -9223372036854775808 to 9223372036854775807
2 of 13
99
I would use math package for getting the maximal and minimal values for integers:
package main
import (
"fmt"
"math"
)
func main() {
// integer max
fmt.Printf("max int64 = %+v\n", math.MaxInt64)
fmt.Printf("max int32 = %+v\n", math.MaxInt32)
fmt.Printf("max int16 = %+v\n", math.MaxInt16)
// integer min
fmt.Printf("min int64 = %+v\n", math.MinInt64)
fmt.Printf("min int32 = %+v\n", math.MinInt32)
fmt.Printf("max float64 = %+v\n", math.MaxFloat64)
fmt.Printf("max float32 = %+v\n", math.MaxFloat32)
// etc you can see more int the `math`package
}
Output:
max int64 = 9223372036854775807
max int32 = 2147483647
max int16 = 32767
min int64 = -9223372036854775808
min int32 = -2147483648
max float64 = 1.7976931348623157e+308
max float32 = 3.4028234663852886e+38
Go Packages
pkg.go.dev › math
math package - math - Go Packages
Ceil returns the least integer value greater than or equal to x. ... Copysign returns a value with the magnitude of f and the sign of sign. ... Cos returns the cosine of the radian argument x. ... Cosh returns the hyperbolic cosine of x. ... Dim returns the maximum of x-y or 0.
Writing a function that returns the max value of a type [~float64 | ~uint | ~int T]
23 votes, 11 comments. Today I was trying to write a generic function to return the maximum value for floats, ints and uints. It seems… More on reddit.com
11
23
March 17, 2024math: add MaxUint, MinInt, MaxInt
The math package is lacking MaxInt, MaxUint, MinInt and MinUint. This makes writing programs that assign a max-value to int or uint without manually specifying the value impossible, if you want to ... More on github.com
14
November 1, 2018Reddit
reddit.com › r/golang › min/max for integers?
r/golang on Reddit: Min/Max for integers?
April 5, 2023 -
Is there no Min/Max function for integers in Golang in the standard library?
This would be a good use-case for generics.
gosamples
gosamples.dev › tutorials › the maximum and minimum value of the int types in go
🍰 The maximum and minimum value of the int types in Go
April 14, 2022 - int min - max: -9223372036854775808 - 9223372036854775807 int8 min - max: -128 - 127 int16 min - max: -32768 - 32767 int32 min - max: -2147483648 - 2147483647 int64 min - max: -9223372036854775808 - 9223372036854775807 uint min - max: 0 - 18446744073709551615 uint8 min - max: 0 - 255 uint16 ...
YourBasic
yourbasic.org › golang › max-min-int-uint
Maximum value of an int · YourBasic Go
yourbasic.org/golang · Go has two predeclared integer types with implementation-specific sizes: a uint (unsigned integer) has either 32 or 64 bits, an int (signed integer) has the same size as a uint. This code computes the limit values as untyped constants. const UintSize = 32 << (^uint(0) ...
Leapcell
leapcell.io › blog › understanding-maximum-integer-values-in-go
Understanding Maximum Integer Values in Go | Leapcell
July 25, 2025 - By selecting appropriate types and implementing proper checks, you can prevent and handle integer overflows effectively. Use math.MaxInt, which provides the platform-specific maximum int value.
YourBasic
yourbasic.org › golang › max-min-function
Compute max of two ints/floats · YourBasic Go
yourbasic.org/golang · There is no built-in max or min function for integers, but it’s simple to write your own. // Max returns the larger of x or y. func Max(x, y int64) int64 { if x < y { return y } return x } // Min returns the smaller ...
DEV Community
dev.to › sw360cab › built-in-min-and-max-methods-in-go-121-24ph
Built-in min() and max() methods in Go 1.21 - DEV Community
April 24, 2024 - Once I would have used the math.Min method, which requires two float64 types as parameters, and I would have done the following: const MAX_TITLE_LENGTH int = 50 // a placeholder title var title string = "..." // the given title titleMaxLength ...
Google Groups
groups.google.com › g › golang-nuts › c › a9PitPAHSSU › m › ziQw1-QHw3EJ
[go-nuts] MAX/MIN NUMBER of each integer type
On Apr 16, 12:26 pm, peterGo <go.peter...@gmail.com> wrote: > Daniel > > On Apr 16, 12:12 pm, Ostsol <ost...@gmail.com> wrote: > > > int64, for > > example, has a maximum of 2^32 - 1. > > MaxInt64 = 1<<63 - 1 = 2^64 - 1 > > Peter ... Either email addresses are anonymous for this group or you ...
Rotational
rotational.io › blog › ranges-of-integer-data-types
Rotational Labs | Ranges of Integer Data Types
As a result, I find myself constantly checking the sizes of standard int types but I haven’t found a good way to Google this. This blog post is a quick reference for the standard sizes and a discussion on why it matters. So without further ado, here are the ranges of the standard numeric types: ... // Constants defined in the math package const ( MaxInt8 int8 = 1<<7 - 1 MinInt8 int8 = -1 << 7 MaxInt16 int16 = 1<<15 - 1 MinInt16 int16 = -1 << 15 MaxInt32 int32 = 1<<31 - 1 MinInt32 int32 = -1 << 31 MaxInt64 int64 = 1<<63 - 1 MinInt64 int64 = -1 << 63 MaxUint8 uint8 = 1<<8 - 1 MaxUint16 uint16 = 1<<16 - 1 MaxUint32 uint32 = 1<<32 - 1 MaxUint64 uint64 = 1<<64 - 1 ) // Complement method (system specific) const ( MaxUint uint = ^uint(0) MinUint uint = 0 MaxInt int = int(MaxUint >> 1) MinInt int = -MaxInt - 1 )
Codecademy
codecademy.com › docs › go › math functions › max()
Go | Math Functions | Max() | Codecademy
June 28, 2023 - Returns the maximum value of two specified numbers.
Go
go.dev › tour › basics › 11
A Tour of Go
A Tour of Go
TutorialsPoint
tutorialspoint.com › finding-maximum-of-two-numbers-in-golang
Finding Maximum of Two Numbers in Golang
April 12, 2023 - In the above code, we declare a function named max that takes two integer arguments a and b. Inside the function, we declare a variable named max and assign the value of a to it. Then, we use a shorthand if-else statement to check if b is greater than a. If it is, we assign the value of b to the max variable. Finally, we return the maximum value. Golang's built-in sort package provides a Ints function that takes a slice of integers as an argument and sorts it in ascending order.
Reddit
reddit.com › r/golang › writing a function that returns the max value of a type [~float64 | ~uint | ~int t]
r/golang on Reddit: Writing a function that returns the max value of a type [~float64 | ~uint | ~int T]
March 17, 2024 - After the check we know the value is an integer, but the compiler doesn't, so we can't use bit arithmetic. The solution I found is to check when the value overflows. ... func infFor[T Types]() T { // Check if T is a float. var f float64 = 1.5 if float64(T(f)) == f { return T(math.Inf(1)) } maxValues := [...]uint64{ math.MaxInt8, math.MaxUint8, math.MaxInt16, math.MaxUint16, math.MaxInt32, math.MaxUint32, math.MaxInt64, math.MaxUint64, } var v T // Check when v overflows.
PixelsTech
pixelstech.net › home › articles › why no max/min function for integer in golang
Why no max/min function for integer in GoLang | PixelsTech
June 8, 2019 - GoLang intentionally omits built-in max/min functions for integer types, a common feature in other languages. While math.Max and math.Min exist for float64, this is due to the inherent complexity of floating-point comparisons, which Go provides ...
Dot Net Perls
dotnetperls.com › int-max-go
Go - int Max (math.MaxInt) - Dot Net Perls
for i := range math.MaxInt32 { if i % 100_000_000 == ... INT MIN: -9223372036854775808 MAX: 9223372036854775807 BYTE MAX: 255 UINT MAX: 18446744073709551615 INT32 MIN: -2147483648 MAX: 2147483647 0 100000000 200000000 300000000 400000000 500000000 600000000 700000000 800000000 900000000 1000000000 ...
GitHub
github.com › golang › go › issues › 28538
math: add MaxUint, MinInt, MaxInt · Issue #28538 · golang/go
November 1, 2018 - The math package is lacking MaxInt, MaxUint, MinInt and MinUint. This makes writing programs that assign a max-value to int or uint without manually specifying the value impossible, if you want to ...
Author Silentd00m
GeeksforGeeks
geeksforgeeks.org › go language › finding-maximum-of-two-numbers-in-golang
Finding Maximum of Two Numbers in Golang - GeeksforGeeks
April 28, 2025 - // Golang program to illustrate // how to find the largest number package main import ( "fmt" "math" ) // Main function func main() { // Finding largest number // among the given numbers // Using Max() function nvalue_1 := math.Max(34, 67) nvalue_2 := math.Max(56.7, 90.8) // Adding maximum numbers res := nvalue_1 + nvalue_2 fmt.Printf("%.2f + %.2f = %.2f", nvalue_1, nvalue_2, res) } Output: 67.00 + 90.80 = 157.80 · Comment · Article Tags: Article Tags: Go Language · Golang-Math · Overview · Go Programming Language (Introduction)7 min read ·
IncludeHelp
includehelp.com › golang › math-maxint-constant-with-examples.aspx
Golang math.MaxInt Constant with Examples
August 26, 2021 - The return type of math.MaxInt constant is int, it returns the highest (maximum) value that can be represented by an int. // Golang program to demonstrate the // example of math.MaxInt Constant package main import ( "fmt" "math" ) func main() { fmt.Printf("Type of math.MaxInt is %T\n", math.MaxInt) ...
Google Groups
groups.google.com › g › golang-nuts › c › f32UN1TYiAI
integer max/min/abs etc in the math package
For int, one implementation is literally: ... I wrote that in less time than I would've spent starting up a browser, doing a search for 'golang Abs', and noticing that math.Abs only deals in float64, and my version certainly does a lot less redundant processing to arrive at the correct answer (and on amd64 deployments, actually _can_ arrive at the correct answer for all possible values).