Beginning Rust: From Novice to Professional

© Carlo Milanesi 2018

Carlo MilanesiBeginning Rusthttps://doi.org/10.1007/978-1-4842-3468-6_4

4. Controlling Execution Flow

Carlo Milanesi¹ 

(1)

Bergamo, Italy

 

In this chapter, you will learn:

• How to use if statements to execute different statements based on a Boolean condition

• How to use if expressions to generate different values based on a Boolean condition

• How to use while statements to repeat some statements as long as a Boolean condition holds

• How to use for statements to repeat some statements for a definite number of times

• What is the scope of validity of variables

Conditional Statements (if)

The main usage of Boolean values is in making decisions about how to let the execution of the program proceed. Suppose you want to print a word, but only ...