Convert a value provided to the JVM to Kb

convertToKb.sh

#!/bin/bash
convertToKb() {
    data="$1"
    unit="${data//[0-9]/}"
    value="${data//[!0-9]}"
    converted="ERROR"
    case $unit in
        k | K)
            converted="$value"
            ;;
        m | M)
            converted=$(echo "scale=2; $value * 1024" | bc)
            ;;
        g | G)
            converted=$(echo "scale=2; $value * 1024 * 1024" | bc)
            ;;
        *)
            converted="$data"
            ;;

    esac
    echo "$converted"

}


result="$(convertToKb $1)"
echo $result