2. JAVA operators can be classified into a number of related
categories as below:-
Arithmetic. + - * / %
Relational. < <= > >= == !=
&& || !
Logical. AND OR NOT
T && T = T F || F= F T=F
F=T
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3. ASSIGNMENT CONDITIONAL INCREMENT
= ? : ++
• Is used to exp1 ? exp2 : exp3 •PRE:- First
assign value to e.g.:- x=(a>b)?a:b subtracts 1 from
operand and then the
variable. result is assigned .
e.g.:- a =10 DECREMENT - - ++m;
•SHORTHAND
a=a+1 • PRE:- First subtracts 1 •POST:- First
assigns the value to
Can also be from operand and then the
the variable on left and
result is assigned .
written as - - m; then decrements
a+=1 operand
•POST:- First assigns the
m++
a = a / (n+1) value to the variable on left
and then decrements
operand
m-- Ankita R Karia 1 February 2012 3
4. JAVA permits mixing of constants and variables of different
types in an expression, but during evaluation it adheres to
very strict rules of type conversion.
If operands are of different types, the “lower” type is
automatically converted to “higher” type before the operation
proceeds. The result is of higher type.
The final result of an expression is converted to the type of
the variable on the left of the assignment before assigning the
value
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5. EXAMPLES ACTION
x= (int) 7.5 7.5 is converted to integer by
truncation
a = (int)21.3/(int)4.5 Evaluated as 21/4 and the result
would be 5
b = (double) sum/n Division is done in floating point
mode
y = (int) (a+b) The result of a+b is converted to
integer
y = (int) a+b a is converted to integer and then
added to b
p = cost ((double)x) Converts x to double before using
it as parameter
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6. JAVA supports basic math functions through Math class
defined in the java.lang.package.
The functions should be used as follows:-
Math.function_name();
java.lang.Math
Example: y = Math.sqrt(x);
Function
name
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7. FUNCTIONS ACTION
sin(x) Returns the sine of the angle x in radians
cos(x) Returns the cosine of the angle x in radians
tan(x) Returns the tangent of the angle x in radians
asin(x) Returns the angle whose sine is y
atan2(x,y) Returns the angle whose tangent is x/y
pow(x,y) Returns xy
exp(x) Returns ex
log(x) Returns the natural logarithm of x
sqrt(x) Returns square root of x
abs(x) Returns absolute of x
max(a,b) Returns maximum of1 a and b
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8. Determine the value of the following
arithmetic expression. (a=5,b=2,c=1)
1. m = ++a*5;
2. p*=x/y; x=10,y=2,p=2;
3. s/=5; s=5;
4. n=b++-c*2;
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11. Determine the value of the following logical
expression. (a=5,b=10,c=-6)
1. a<b && a<c;
2. a<b && a>c;
3. a= = c || b>a;
4. b>15 && c<0 || a>0;
5. (a/2.0==0.0&&b/2.0!=0.0)||c<0.0
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13. 1. The straight-line method of computing the yearly depreciation of the value of an item
is given by
depreciation = Purchase Price – Salvage Value
Years of service
Write a program to determine the salvage value of an item when the purchase price,
years of service and Annual depreciation are given
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