var name = "Tolu";

println(name);

var upperCaseText = "This should be in upperCase".to_upper();

var nameToUpper = name.to_upper();

var nameToLower = nameToUpper.to_lower();

println(upperCaseText);

println(nameToUpper);

println(nameToLower);

var stringContainsWordHello = "World, Hello, Welcome to my wonderland".contains("Hello");

println("String contains hello = " + stringContainsWordHello);

var appendString = "Hello,".append(" World");

println(appendString);

var stringStartsWithHello = "World, Hello, Welcome to my wonderland".starts_with("Hello");

println("Does string start with Hello ? " + stringStartsWithHello);

var nullString = "";

println("Is nullString null or whitespace ? " + nullString.is_null_or_whitespace());