What is the decision ? Equality and relational operators. Precedence and associatively of operations How to use if ? Practice

1. Using Java
MINISTRY OF EDUCATION & HIGHER EDUCATION
COLLEGE OF SCIENCE AND TECHNOLOGY
KHANYOUNIS- PALESTINE
Lecture 6
Decision Making : Equality and Relational Operators

2.  What is the decision ?
 Equality and relational operators.
 Precedence and associatively of operations
 How to use if ?
 Practice
 Be care
 Emank X Mezank
2Presented & Prepared by: Mahmoud R. Alfarra

3.  For example, the condition "grade is greater
than or equal to 60" determines whether a
student passed a test.
3Presented & Prepared by: Mahmoud R. Alfarra
What is the decision ?
Note 5 applications demand the making decision
HW 5.1

4.  Conditions in if statements can be formed by
using the equality operators and relational
operators.
 Equality operators are used to check if two
operands are equals or not.
 Relational operators are used to check if one
of two operands are greater or less than
another.
4Presented & Prepared by: Mahmoud R. Alfarra
Equality and relational operators

5. 5Presented & Prepared by: Mahmoud R. Alfarra
Equality and relational operators

6. 6Presented & Prepared by: Mahmoud R. Alfarra
Precedence and associatively of operations

7. 7Presented & Prepared by: Mahmoud R. Alfarra
How to use if ?
If (condition)
{
/*Tasks will be executed
* if the condition true*/
}
condition
yesNo
If true
Executed
at all

8.  Write a program to compare two numbers
and print the larger, smaller, equal or not.
8Presented & Prepared by: Mahmoud R. Alfarra
Example: Compare Integers
Write a program to calculate the summation,
multiple, division, subtraction and then compare
the results to print the larger, smaller, equal or notHW 5.2

9. 9Presented & Prepared by: Mahmoud R. Alfarra
Example: Compare Integers
Rewrite
this
program
using
another
values
HW 5.3

10. 10Presented & Prepared by: Mahmoud R. Alfarra
Forgetting the left and/or right parentheses for the condition
in an if statement is a syntax error the parentheses are
required.
Confusing the equality operator, ==, with the assignment
operator, =, can cause a logic error or a syntax error.
It is a syntax error if the operators ==, !=, >= and <= contain
spaces between their symbols, as in = =, ! =, > = and < =,
respectively.
Reversing the operators !=, >= and <=, as in =!, => and =<, is
a syntax error.

11. ‫تعاىل‬ ‫هللا‬ ‫قال‬:
(‫املنفوش‬ ‫كالعهن‬‫اجلبال‬ ‫تكون‬ ‫يوم‬)
11Presented & Prepared by: Mahmoud R. Alfarra

12. If … else
&
The family 
12Presented & Prepared by: Mahmoud R. Alfarra