Go 程序检查字符是否为大写字母

编写一个 Go 程序来检查字符是大写还是小写。unicode.IsUpper 函数用于查找 Rune 是否为大写字符。我们在 If else 条件（if unicode.IsUpper(upch)）中使用此 IsUpper 函数来查找给定的字符是否为大写。

package main

import (
    "bufio"
    "fmt"
    "os"
    "unicode"
)

func main() {

    reader := bufio.NewReader(os.Stdin)

    fmt.Print("Enter Character to Check Uppercase = ")
    upch, _, _ := reader.ReadRune()

    if unicode.IsUpper(upch) {
        fmt.Println("You have Entered the Uppercase Character")
    } else {
        fmt.Println("The entered Character is Not the Uppercase")
    }
}

Go 程序检查字符是大写还是小写

在此大写字母示例中，我们将给定的字节转换为 Rune（if unicode.IsUpper(rune(upch))），然后使用 IsUpper 函数。

package main

import (
    "bufio"
    "fmt"
    "os"
    "unicode"
)

func main() {

    reader := bufio.NewReader(os.Stdin)

    fmt.Print("Enter Character to Check Uppercase = ")
    upch, _ := reader.ReadByte()

    if unicode.IsUpper(rune(upch)) {
        fmt.Println("You have Entered the Uppercase Character")
    } else {
        fmt.Println("The entered Character is Not the Uppercase")
    }
}

SureshMac:GoExamples suresh$ go run charIsUpper2.go
Enter Character to Check Uppercase = o
The entered Character is Not the Uppercase
SureshMac:GoExamples suresh$ go run charIsUpper2.go
Enter Character to Check Uppercase = M
You have Entered the Uppercase Character

在此 Golang 示例中，我们使用 If 条件（if upch >= ‘A’ && upch <= ‘Z’）来检查字符是否在 A 和 Z 之间，如果为真，则表示大写。

package main

import (
    "bufio"
    "fmt"
    "os"
)

func main() {

    reader := bufio.NewReader(os.Stdin)

    fmt.Print("Enter Character to Check Uppercase = ")
    upch, _ := reader.ReadByte()

    if upch >= 'A' && upch <= 'Z' {
        fmt.Println("You have Entered the Uppercase Character")
    } else {
        fmt.Println("The entered Character is Not the Uppercase")
    }
}

SureshMac:GoExamples suresh$ go run charIsUpper3.go
Enter Character to Check Uppercase = A
You have Entered the Uppercase Character
SureshMac:GoExamples suresh$ go run charIsUpper3.go
Enter Character to Check Uppercase = k
The entered Character is Not the Uppercase

此 程序 使用 ASCII 码（if upch >= 97 && upch <= 122）来查找字符是否为大写。

package main

import (
    "bufio"
    "fmt"
    "os"
)

func main() {

    reader := bufio.NewReader(os.Stdin)

    fmt.Print("Enter Character to Check Uppercase = ")
    upch, _ := reader.ReadByte()

    if upch >= 97 && upch <= 122 {
        fmt.Println("You have Entered the Lowercase Character")
    } else {
        fmt.Println("The entered Character is the Uppercase")
    }
}

SureshMac:GoExamples suresh$ go run charIsUpper4.go
Enter Character to Check Uppercase = B
The entered Character is the Uppercase
SureshMac:GoExamples suresh$ go run charIsUpper4.go
Enter Character to Check Uppercase = z
You have Entered the Lowercase Character