Go remainder solving skills sharing

To find the remainder in the Go language, you can use the % operator, or use the Mod function of the math/big package to find the remainder with arbitrary precision. For a negative dividend, use the absolute value function to obtain a positive remainder. Practical applications include the calculation of remaining funds after players purchase items in games.

Tips for finding remainders in Go

In Go language, the remainder operator is % . It returns the remainder of the division of two integers.

General methods for finding remainders

The simplest way to find remainders is to use the % operator. For example:

package main

import "fmt"

func main() {
    dividend := 10
    divisor := 3
    remainder := dividend % divisor
    fmt.Println(remainder) // 输出: 1
}

Use the modulo function

math/big The package provides the Mod function, which can calculate any Remainder of precision. This is useful for handling integers larger than the int64 range.

package main

import (
    "fmt"
    "math/big"
)

func main() {
    a := new(big.Int).SetInt64(1000000000000000000)
    b := new(big.Int).SetInt64(3)
    remainder := new(big.Int)
    remainder.Mod(a, b)
    fmt.Println(remainder) // 输出: 1
}

Finding the remainder of a negative number

If the dividend is negative, the remainder is also negative. To get a positive remainder, you need to use the absolute value function:

package main

import (
    "fmt"
    "math"
)

func main() {
    dividend := -10
    divisor := 3
    remainder := math.Abs(float64(dividend % divisor))
    fmt.Println(remainder) // 输出: 1
}

Practical Case

Suppose you are developing a game where players can purchase items from the store. Each item has a specific price, and players also have limited funds. You need to find the remaining funds after the player purchases an item.

package main

import "fmt"

func main() {
    playerFunds := 100
    itemPrice := 50
    remainder := playerFunds % itemPrice
    fmt.Println("剩余资金:", remainder) // 输出: 50
}

By following the techniques presented in this article, you can efficiently solve remainders in Go.

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