Conditional Statements and Loops
Conditional statements and loops are the backbone of any programming or scripting language. The ability to react to a state and choose a path to take or the ability to repeat instructions is vital.
Each conditional statement or loop creates a branch in a script or piece of code. The branch represents a split in the instruction set. Branches can be conditional, such as one created by an if statement, or unconditional, such as a foreach loop. As the number of branches increases, so does the complexity. The paths through the script spread out in the same manner as the limbs of a tree.
Statements or lines of code may be executed when certain conditions are met. PowerShell provides if and switch statements for this purpose. Loops allow code to be repeated for a set of elements or until a specific condition is met.
In this chapter, the following topics are covered:
if,else, andelseifswitch- Loops ...