Show Apex String With NewLine in Visualforce Page

You can add \n for HTML NewLine character in Apex String, and you can replace each \n by <br/> in Visualforce page using JSENCODE function.

SUBSTITUTE(JSENCODE(Variable), '\\n', '<br/>')

Apex Controller:

public class SFController{  
    public String myVariable {get;set;}  
    public SFController(){  
        myVariable = 'Sales Cloud' + '\n' + 'Service Cloud' + '\n' + 'Community Cloud';  

Visualforce Page:

<apex:page controller="SFController">   
    <apex:outputLabel value="{!SUBSTITUTE(JSENCODE(myVariable), '\\n', '<br/>')}" escape="false"/ >