2 Einfache Programme

= compares two values

An assignment a=b is not an expression

Expressions that consist of multiple parts have no type

Char is not a numeric type

Evaluating an expression means outputting its result

One has to evaluate an expression to determine its type

Large integer numbers have type long

A literal is not an expression

Local variables are automatically initialized

When passing a literal string as argument to a method, no quotes are needed

Expressions must consist of more than one piece

\ is a normal character in char and String literals

Every sequence of letters and digits starting with a letter can be used as an identifier

There are no long literals

String literals can be in single quotes

One needs to call the String constructor to get a String object from a literal

The type of a numerical expression depends on the type expected by the surrounding context

Variables can be used even without being declared beforehand

Variable declarations don't need a type

= stores an expression in a variable

In integer numbers, decimal digits with value `0` take less storage than decimal digits with other values

Sprechen Sie Java: Eine Einführung in das systematische Programmieren, 4. Auflage
2. Einfache Programme