25 lines
1.7 KiB
HTML
25 lines
1.7 KiB
HTML
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<p>
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Welcome to the first lecture. This is what you will see most of the time.
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A text in the beginning, explaining all the things you need to know for the lecture and what you have to do,
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then a text-editor, where you supposed to edit the code to complete the given task and three buttons below the editor. The execute Button will compile
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and execute your code, the submit button will do the same and also check, if your solution is correct. If your solution was correct, you can press the
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continue button to go to the next lecture.
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</p>
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<p>
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Now back to the lecture. This is probably the most simple program. That is why you find it in almost any basic programming book or tutorial.
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Ignore for now the <code>#include <stdio.h></code>. It is not important for now. Below that you see the <b>main-function</b>.
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It marks the <b>entriepoint for your program</b>.
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From there on the computer will exactly <b>execute</b> what you write <b>in order</b> (with exceptions we won't go into). That is what is commonly know as <b>imperative programming</b>.
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</p>
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<p>
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The first thing in our program is a comment and is initiated by double slashes "//". Everything after that in the same line will be ignored by the compiler and therefore not be executed.
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For longer comments you can also surround it by "/* */" so you don't have to type double slashes in every line.
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</p>
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<p>
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So now to the exciting part. The line:</br>
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<code> printf("Hello User!"); </code></br>
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will write text to the console. In this case <it>Hello User!</it>. Every statement in C ends with a semicolon ";".
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Your task will be to experiment with that line. Change the program to print out Hello World!.
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</p>
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