Declarations as statements - declarations in conditions

Lecture 2 - Slide 8 : 29

Introduce and initialize a variable at the place where it is first used

It is possible to delare variables in a condition of an if statement

Declarations inside blocks
- C89: All declarations appear before the first statement
- C99 and C++: declarations and statements can be mixed
  - Avoids having all declarations first in block, and assignments later in the block
Declarations in the condition of an if statement
- The scope of such a name is the rest of the if, including the else part
- Serves as a scope restriction, compared with a declaration just before the if statement

Declarations before statements - C89 Style.

A declaration is a statement in C++.

A declaration in the condition of an if.