Object Oriented Programming with C++, Second Edition

2.11 CONTROL STATEMENTS

So far, we have seen programs using assignment statements and library functions. If a programming language is to have only these statements, computer would be reduced to a calculator. Computers are powerful because they (program) can take a decision. Execute selectively. For this, language needs control statements.

2.11.1 if statement

A simple if statement has the following format:

• keyword “if”
• a condition in the brackets
• a statement (followed by the semicolon)

For example:

if ( condition ) statement ;

if (marks >=40) result = pass;

Please note that a parenthesis around the condition is mandatory. If the condition is true then the statement is executed, otherwise not. Ideally, conditions should be relational expression ...