Go Program to Check Character is a Lowercase

Write a Go Program to check whether the character is lowercase or not. The unicode IsLower finds the Rune is a Lowercase character. We used this IsLower function in the If else statement (if unicode.IsLower(lwch)) to find the given character is lowercase or not.

package main

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

func main() {

    reader := bufio.NewReader(os.Stdin)

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

    if unicode.IsLower(lwch) {
        fmt.Println("You have Entered the Lowercase Character")
    } else {
        fmt.Println("The entered Character is Not the Lowercase")
    }
}

Go Program to Check Character is a Lowercase or Not

In this Go lowercase example, we change the given byte character to Rune (if unicode.IsLower(rune(lwch))) and then use the IsLower function.

package main

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

func main() {

    reader := bufio.NewReader(os.Stdin)

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

    if unicode.IsLower(rune(lwch)) {
        fmt.Println("You have Entered the Lowercase Character")
    } else {
        fmt.Println("The entered Character is Not the Lowercase")
    }
}

SureshMac:GoExamples suresh$ go run charIsLower2.go
Enter Character to Check Lowercase = o
You have Entered the Lowercase Character
SureshMac:GoExamples suresh$ go run charIsLower2.go
Enter Character to Check Lowercase = M
The entered Character is Not the Lowercase

In this Golang example, We used the If condition (if lwch >= ‘a’ && lwch <= ‘z’) to check whether the given character is between a and z, and if true, it is lowercase.

package main

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

func main() {

    reader := bufio.NewReader(os.Stdin)

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

    if lwch >= 'a' && lwch <= 'z' {
        fmt.Println("You have Entered the Lowercase Character")
    } else {
        fmt.Println("The entered Character is Not the Lowercase")
    }
}

SureshMac:GoExamples suresh$ go run charIsLower3.go
Enter Character to Check Lowercase = l
You have Entered the Lowercase Character
SureshMac:GoExamples suresh$ go run charIsLower3.go
Enter Character to Check Lowercase = Y
The entered Character is Not the Lowercase

This Golang Program uses the ASCII values (if lwch >= 97 && lwch <= 122) to find the character is lowercase or not.

package main

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

func main() {

    reader := bufio.NewReader(os.Stdin)

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

    if lwch >= 97 && lwch <= 122 {
        fmt.Println("You have Entered the Lowercase Character")
    } else {
        fmt.Println("The entered Character is Not the Lowercase")
    }
}

SureshMac:GoExamples suresh$ go run charIsLower4.go
Enter Character to Check Lowercase = q
You have Entered the Lowercase Character
SureshMac:GoExamples suresh$ go run charIsLower4.go
Enter Character to Check Lowercase = Z
The entered Character is Not the Lowercase