How to stop users to continue in golang

I want to prevent users if entering number Greater than 5 and less than 1

how can I do that?

package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
)

func main()  {

	fmt.Println("Please rate our pizza between 1 and 5")

	reader := bufio.NewReader(os.Stdin)
	input, _ := reader.ReadString('\n')

	fmt.Println("Yourr rate is: ", input)
	convertedInput, err := strconv.ParseFloat(strings.TrimSpace(input), 64)

	if convertedInput > 5 || convertedInput < 1 {
		fmt.Println("you should rate between 1 to 5")

		####want to stop program here

	}else {
	    fmt.Println(convertedInput)
	}

	if err != nil {
		fmt.Println(err)
	}else {
		fmt.Println("your rate is: ", convertedInput)
	}
	
}

You can return from the main function to stop program execution.

    if convertedInput > 5 || convertedInput < 1 {
        fmt.Println("you should rate between 1 to 5")
        return
    }

Or, if you want to return a nonzero exit code to indicate error, you can use os.Exit. this is probably appropriate for you since the program did not succeed.

import (
 ....
 "os"
)
...

    if convertedInput > 5 || convertedInput < 1 {
        fmt.Println("you should rate between 1 to 5")
        os.Exit(1)
    }

Finally, you could panic which would dump a stack trace. That wouldn't be appropriate for this case as it's an error with user input, not a programming error you'd debug with a stack trace. But it will end the program.

Maybe instead you'd prefer to ask the user repeatedly until they provide a valid answer. For this, use a for loop. This is one way:

func main()  {

	for {
		fmt.Println("Please rate our pizza between 1 and 5")

		input, _ := reader.ReadString('\n')

		fmt.Println("Yourr rate is: ", input)
		convertedInput, err := strconv.ParseFloat(strings.TrimSpace(input), 64)
		if convertedInput > 5 || convertedInput < 1 {
			fmt.Println("you should rate between 1 to 5")
			continue
		}
		fmt.Println(convertedInput)

		if err != nil {
			fmt.Println(err)
		} else {
			fmt.Println("your rate is: ", convertedInput)
		}
		break
	}
    
}

Looking back at this code in more detail,

input, _ := reader.ReadString('\n')

I recommend against ever ignoring errors. You don't know what input is here. Try the code on the playground to see how that causes unexpected behavior.

And down here:

    convertedInput, err := strconv.ParseFloat(strings.TrimSpace(input), 64)

    if convertedInput > 5 || convertedInput < 1 {
        fmt.Println("you should rate between 1 to 5")

        ####want to stop program here

    }else {
        fmt.Println(convertedInput)
    }

    if err != nil {
        fmt.Println(err)
    }else {
        fmt.Println("your rate is: ", convertedInput)
    }

These conditions are in a funny order. You check convertedInput before you check the associated err. I would do it like this:

    if convertedInput, err := strconv.ParseFloat(strings.TrimSpace(input), 64); err != nil {
        fmt.Println("Error converting input to Float: %s", err.Error())
    } else if convertedInput > 5 || convertedInput < 1 {
        fmt.Println("you should rate between 1 to 5")
        ## Do whatever ending / looping
    }else {
        fmt.Println("your rate is: ", convertedInput)
    }

That way you're only checking convertedInput if ParseFloat succeeded.

Finally,