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Variables also have a lifetime. The computer manages the storage of variables, and when the life span is over, the memory is released again (Garbage-Collector). The range (Scope) in which a variable is accessible or active is defined by brackets ({}) (see also classes and functions). Variables that are at the top level are called global variables as they are accessible all over the program. Variables declared within brackets are local variables. If a local variable has the same name as a global variable, the local variable overrides it within its scope.
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// variablen deklarationDeclaration int x1 = 15; float valF = 0.323; boolean bFlag = false; String message = "hallo 1"; char character = 'g'; String msg1 = new String("hallo 2"); println(x1); println(valF); println(bFlag); println(message); println(character); println(msg1); |
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int length1 = 150; int length2 = 200; size(300,300); // define window size fenstergrosse background(0); // define background colour stroke(255,255,255); // define line colour line(100,10,100,length1); // draw a line line(150,10,150,length2); line(200,10,200,250); fill(0,0,0); // fill colour strokeWeight(5); // line thickness ellipse(100,length1,50,50); // draw an ellipse ellipse(150,length2,50,50); // draw an ellipse noFill(); // turn off fill ellipse(200,250,50,50); // draw an ellipse |
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