Thanks, i am new and i am reading a material with contents below in bold
program.
To create
operations, you write algorithms and implement them in a programming language. Because a data element
in a complex program usually has many operations, to separate operations from each other and to use them effectively
and in a convenient manner,
you use functions to implement algorithms. After a brief introduction in Chapters 2 and
3, you will learn the details of functions in Chapter 6. Certain algorithms require that a program make decisions, a
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process called selection. Other algorithms might require certain statements to be repeated until certain conditions are
met, a process called repetition.