expected body of lambda expressioncc

The body of a lambda expression is a single expression or a block of statements enclosed in curly braces. The expected body of a lambda expression depends on the functional interface it is implementing.

For a functional interface that takes no arguments and returns a value, the body would contain a single expression that evaluates to the return value. For example:

Supplier<String> supplier = () -> "Hello World";

For a functional interface that takes one or more arguments and returns a value, the body would contain a block of statements that use the arguments and return a value. For example:

Function<Integer, String> converter = (num) -> {
    String result = "";
    if (num % 2 == 0) {
        result = "even";
    } else {
        result = "odd";
    }
    return result;
};

In general, the body of a lambda expression should be concise and readable, and should not contain any unnecessary code or side effects.