kotlin string replace

// replace whitespaces in string
fun main() {
    
    var str = "T    his is b  ett     er."
    var pharse = str.replace("\\s".toRegex(),"")
    println(pharse)
    
}

We've used regular expression \\s that finds all white space characters (tabs, spaces, new line character, etc.) 
in the string. Then, we replace it with "" (empty string literal).