Create README.md

Signed-off-by: David Rotermund <54365609+davrot@users.noreply.github.com>

python_basics/while/README.md

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+# Flow Control while, pass, break, continue
+{:.no_toc}
+
+<nav markdown="1" class="toc-class">
+* TOC
+{:toc}
+</nav>
+
+## The goal
+
+While we wait... 
+
+Questions to [David Rotermund](mailto:davrot@uni-bremen.de)
+
+**Logic blocks need to be indented.​ Preferable with 4 spaces!**
+
+## [The while statement](https://docs.python.org/3/reference/compound_stmts.html#the-while-statement)
+
+```python
+i = 0​
+while i < 3:​
+    print(i)​
+    i += 1
+```
+
+Output
+
+```python
+0​
+1​
+2
+```
+
+## The full statement
+
+```python
+while_stmt ::=  "while" assignment_expression ":" suite
+                ["else" ":" suite]
+```
+
+## [pass](https://docs.python.org/3/reference/simple_stmts.html#the-pass-statement)
+
+Since Python uses indents as definition for a functional block it needs pass for signaling an empty functional block. ​
+
+> pass is a null operation — when it is executed, nothing happens. It is useful as a placeholder when a statement is required syntactically, but no code needs to be executed
+
+```python
+pass_stmt ::=  "pass"
+```
+
+## [break](https://docs.python.org/3/reference/simple_stmts.html#the-break-statement)
+
+> break may only occur syntactically nested in a for or while loop, but not nested in a function or class definition within that loop.
+
+> It terminates the nearest enclosing loop, skipping the optional else clause if the loop has one.
+
+> If a for loop is terminated by break, the loop control target keeps its current value.
+
+```python
+break_stmt ::=  "break"
+```
+
+```python
+for i in range(0, 5):​
+    if i == 2:​
+        break​
+    print(i)
+```
+
+Output:
+
+```python
+0
+1
+```
+
+
+## [continue](https://docs.python.org/3/reference/simple_stmts.html#the-continue-statement)
+
+> continue may only occur syntactically nested in a for or while loop, but not nested in a function or class definition within that loop. It continues with the next cycle of the nearest enclosing loop.
+
+```python
+continue_stmt ::=  "continue"
+```
+
+```python
+for i in range(0, 5):​
+    if i == 2:​
+        continue​
+    print(i)
+```
+
+Output:
+
+```python
+0
+1
+3
+4
+```