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🍰 The maximum and minimum value of the int types in Go

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To get the maximum and minimum value of various integer types in Go, use the math package constants. For example, to get the minimum value of the int64 type, which is -9223372036854775808, use the math.MinInt64 constant. To get the maximum value of the int64 type, which is 9223372036854775807, use the math.MaxInt64. To check the minimum and maximum values of different int types, see the following example and its output.

For unsigned integer types, only the max constant is available because the minimum value of unsigned types is always 0.

package main

import (
    "fmt"
    "math"
)

func main() {
    // int
    fmt.Printf("int min - max: %d - %d\n", math.MinInt, math.MaxInt)
    // int8
    fmt.Printf("int8 min - max: %d - %d\n", math.MinInt8, math.MaxInt8)
    // int16
    fmt.Printf("int16 min - max: %d - %d\n", math.MinInt16, math.MaxInt16)
    // int32
    fmt.Printf("int32 min - max: %d - %d\n", math.MinInt32, math.MaxInt32)
    // int64
    fmt.Printf("int64 min - max: %d - %d\n", math.MinInt64, math.MaxInt64)

    // unsigned
    // uint
    fmt.Printf("uint min - max: %d - %d\n", uint(0), uint(math.MaxUint))
    // uint8
    fmt.Printf("uint8 min - max: %d - %d\n", 0, math.MaxUint8)
    // uint16
    fmt.Printf("uint16 min - max: %d - %d\n", 0, math.MaxUint16)
    // uint32
    fmt.Printf("uint32 min - max: %d - %d\n", 0, math.MaxUint32)
    // uint64
    fmt.Printf("uint64 min - max: %d - %d\n", 0, uint64(math.MaxUint64))
}

Output:

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 min - max: 0 - 65535
uint32 min - max: 0 - 4294967295
uint64 min - max: 0 - 18446744073709551615

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