$4.$ Control Structures

$4$a$.$ In learning a new language, what are the two selection structures that you should investigate? Using the BNF notation, provide the Java, C$++,$ and C# syntax for these structures. How do they compare?

$[14]$

$4$b$.$ Using the BNF noation, provide the Python Syntax for the two common selection structures. Compare the Python syntax to the Java syntax. $[06]$

$4$c$.$ In learning a new language, what are the three iteration structures that you should investigate? Using the BNF notation, provide the Java, C$++,$ and C# syntax for these structures. How do they compare? $[20]$

$4$d$.$ Using the BNF notation, provide the Python Syntax for the three common iteration structures. Compare the Python syntax to the Java syntax. $[08]$

$4$e$.$ When is recursion preferred to iteration and when is it not? $[02]$

$4$f$.$ Name one programming language that supports recursion and one that does not.