(Using Expressions,
Statements,
Operators and
Conditional
Statement)
Prepared By:
Sallar Khan
Contents
O Expression
O Assignment Operators
O Arithmetic Operator
O Increment and Decrement Operators
O Relational Operators
O Logical Operators
O If-Else Conditional Statements
O Nested If Else Statement
O Switch Case
Expression
O An expression is a sequence
of operators and their operands, that
specifies a computation.
O Expression evaluation may produce a result
(e.g., evaluation of 2+2 produces the
result 4)
Assignment Operators
O The assignment operator assigns a value to
a variable.
O X=5
This statement assigns the integer
value 5 to the variable x. The assignment
operation always takes place from right to
left, and never the other way around.
Arithmetic Operators
The five arithmetical operations supported by C++ are:
operator
description
+
addition
-
subtraction
*
multiplication
/
division
%
modulo
Increment Or Decrement
Operators
O Some expression can be shortened even
more: the increase operator (++) and the
decrease operator (--) increase or reduce by
one the value stored in a variable.
O E.g: i++ or i--
Relational & Comparison
Operators
O Two expressions can be compared using relational and equality
operators. For example, to know if two values are equal or if
one is greater than the other.
Operator
Description
==
Equal to
!=
Not equal to
<
Less than
>
Greater than
<=
Less than or
equal to
>=
Greater than or
equal to
Logical Operators
O ( !, &&, || )
O !  Represents NOT operation.
O &&  Represents AND operation.
O ||  Represents OR operation.
If-else Conditional Statement
O The if...else executes body of if when the test
expression is true and executes the body of else if test
expression is false.
Nested-If else Statement
O Nested if...else are used if there are more than one test
expression.
Switch Case
O Consider a situation in which, only one block
of code needs to be executed among many
blocks. This type of situation can be handled
using nested if...else statement but, the
better way of handling this type of problem
is using switch...case statement.
..Switch Case (Syntax)
Thank You!