Page 161 - ComputerScience_Class_11

5. If int p = 5, k;
k = (++p * (p-- * 2));
Ans. 72 Working: 6 * (6 * 2) = 6 * (12) = 72

Assignment Operator
The assignment operator is used to assign a value or an expression to a variable. Java has one assignment operator
which is the “=” operator. For example:
int a = 50;
double d = 34.7;
In an assignment statement, the part on the left side of the operator and the part on the right side have different roles.
The differences between the left-hand side and the right-hand side of an assignment are given in the table below:

Left-Hand Side Right-Hand Side

It is the variable that receives the value. It is the value or expression that is assigned to the variable.
It represents the memory location where the result It represents the data or calculation whose result will be stored.
is stored.
It must be a variable name. It can be a constant, variable or expression.

Shorthand Operators
Java allows a way to represent some binary operators in a shorter way using shorthand assignment operators. They
assign an expression to a variable. They are also known as compound assignment operators.
Let us see all the different types of shorthand operators.

Operator Meaning Description Example Equivalent Arithmetic
Expression
+= Addition Assignment It is used to add the value of the c += 1 c = c + 1
right operand to the variable and
assign the result to the variable.
-= Subtraction Assignment It is used to subtract the value of the d -= 5 d = d - 5
right operand from the variable and
assign the result to the variable.
*= Multiplication Assignment It is used to multiply the variable by m *= b m = m * b
the value of the right operand and
assign the result to the variable.
/= Division Assignment It is used to divide the variable by the div /= 4 div = div / 4
value of the right operand and assign
the result to the variable.

%= Remainder Assignment It is used to divide the variable by rem %= 5 rem = rem % 5
the value of the right operand and
assign the remainder to the variable.

Relational Operators
A relational operator is used to compare two variables or expressions and result in true or false. There are six types of
relational operators.

Variables and Expressions 159