This document discusses various programming concepts in C#, including comments, arithmetic operations, relational operators, assignment operations, increment/decrement operators, and loop statements. It provides examples of code using these different concepts, such as using various arithmetic operators like addition and multiplication, relational operators like equal and not equal, assignment operators, and examples of for, while, and do-while loop statements.

1. Renas R. Rekany Object-Oriented-Programming
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Programming Language with
C_Sharp
Object-Oriented-Programming
Renas R. Rekany

2. Renas R. Rekany Object-Oriented-Programming
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Introduction to C#
Comments
1- Single Line ( // )
Ex: Int x,y,s;
S=x+y; // the sum of x,y
2- Multiple Line (/* */)
Ex: Int x,y,s;
S=x+y; /* the sum
of x,y */
Arithmetic Operations
Operations Arithmetic in c#
Addition +
Subtraction -
Multiplication *
Division /
Modulus %
Precedence of Arithmetic Operations
( )
*,/,%
+,-
<,<=,>,>=
==,!=
=

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Ex z = p * r ٪ q + w / x – y
(6) (1) (2) (4) (3) (5)
Ex y = a * x * x + b * x + c
(6) (1) (2) (4) (3) (5)
Equality and Relational Operator
Standard Operator C# Operator Ex in C#
= == If (x==y)
≠ != If (x!=y)
> > If (x>y)
≥ >= If (x>=y)
< < If (x<y)
≤ <= If (x<=y)
Assignment operations
Int c;
c=c+3; c+=3;
c ‫ــ‬ =3;
c*=3;
c/=3;
(var) = (var) (operator) (expiration)
If true
(var) (operator) = (expiration)

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Increment and Decrement Operator
Operator Call Ex
++ Pre Increment ++ a
++ Post Increment a++
-- Pre Decrement --b
-- Post Decrement b--
Ex : int c=5;
MessageBox.Show(c); //5
MessageBox.Show(c++); // 5
MessageBox.Show(++c); // 6
C=5;
MessageBox.Show(c); // 5
MessageBox.Show(++c); // 6
MessageBox.Show(c); // 6

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Loop Statement In C#
For While Do-While
For (int ; condition ; increment)
Ex :
For (int i=0;i<=5;i++)
Textbox1.text=textbox1.text+i;
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While (condition)
State;
Ex :
Int i=0;
While (i<=5)
{
Textbox1.text=textbox1.text+ i;
i i =i+1;
}
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Do
{ State}
While (condition);
Ex :
int i=0;
do
{
Textbox1.text=textbox1.text+ i;
i++;
} While (i<=5);
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