class Test
{
public static void main(String[] args)
{
String age="22";
String s="he is "+age+" years old.";
System.out.println(s);
String str1="freetmielearn";
String str2="hi";
String str3=str1.concat(str2);
System.out.println(str3);
int a=22;
String s1="he is "+a+" years old.";
System.out.println(s1);
String s2="six "+2+2+2;
System.out.println(s2);
String s3="six "+(2+2+2);
System.out.println(s3);
}
}