Arithmetic and Arithmetic assignment operators Operators, Arithmetic and Arithmetic assignment operators. Increment Operator, Decrement Operator. Relational Operator

1. COMPUTER PROGRAMMING
Imtiaz Ali

2. INTRODUCTION TO COMPUTER PROGRAMMING
1) Operators, Arithmetic and Arithmetic assignment operators.
2) Increment Operator, Decrement Operator.
3) Relational Operator.

3. Operators
• Operators are words or symbols that cause a program to do
something to variables.
• For example, the arithmetic operators (+) and (-) cause a
program to add or subtract two numbers.
Many different kind of operators
• + Addition
• - Subtraction
• * Multiplication
• / Division
• % Remainder

4. Fahrenheit to Celsius Temperature conversion
#include<stdio.h>
void main(void)
{
int ftemp,ctemp;
pritnf((“Type temperature in degree fahrenheit”);
scanf((“%d”,&ftemp);
ctemp=(ftemp-32)*5/9;
printf(“Temperature in degree Celsius is %d”,ctemp);
}

5. Celsius to Fahrenheit Temperature conversion
#include<stdio.h>
void main(void)
{
int ftemp,ctemp;
pritnf((“Type temperature in degree fahrenheit”);
printf(“Temperature in degree Celsius is %d”,ctemp);
}

6. Operator Precedence
• We have parenthesis around f(temp-32) known as precedence.
• The fact (*) abd (/) are evaluated before(+) and(-).
• We say that (*) and (/) has higher precedence than (+) and (-).
Remainder Operator
• Remainder operator(sometimes called modulor operator)
may be unfamiliar to you.
• It is used to find remainder when one number is divided by
another
• For example answer=13%5
value is 3

7. Expressions versus Variables
Days=years*365;
void main(void)
{
int num=2;
printf(“Number plus four is”,num+4);
}

8. Arithmetic Assignment Operator
Syntax:
Arithmetic op=
• += (Addition Assignment Operator)
• -= (Subtraction Assignment Operator)
• *= (Multiplication Assignment Operator)
• /= (Division Assignment Operator)
• %= (Remainder Assignment Operator)
• a+=1 is same as=> a=a+1
• a-=1 is same as=> a=a-1
• a*=1 is same as=> a=a*1
• a/=1 is same as=> a=a/1
• a%=1 is same as a=a%1

9. Increment Operator
+=,-=,++,--
+=(Addition Assignment Operator)
It is also known as increment operator
Syntax:
variable+=value;
variable=variable+value
-=(Subtraction Assignment Operator)
It is also known as increment operator
Syntax:
Variable-=value;
variable=variable-value

10. • Postfix increment and Postfix decrement Operator
• Prefix increment and Prefix decrement Operator
Op++
• It is postfix increment operator
++Op
• It is prefix increment operator
Op--
• It is postfix decrement operator
--Op
• It is prefix decrement operator

11. variable++ as postfix increment operator
#include<stdio.h>
void main(void)
{
int num=0;
printf(“Number=%dn”,num);
printf(“Number=%dn”,num++);
printf(“Number=%dn”,num);
}

12. ++variable as prefix increment operator
#include<stdio.h>
void main(void)
{
int num=0;
printf(“Number=%dn”,num);
printf(“Number=%dn”,++num);
printf(“Number=%dn”,num);
}

13. variable-- as Postfix decrement operator
#include<stdio.h>
void main(void)
{
int num=0;
printf(“Number=%dn”,num);
printf(“Number=%dn”,num--);
printf(“Number=%dn”,num);
}

14. --variable as Prefix decrement operator
#include<stdio.h>
void main(void)
{
int num=0;
printf(“Number=%dn”,num);
printf(“Number=%dn”,--num);
printf(“Number=%dn”,num);
}

15. Relational Operators
< Less than
> Greater than
<= Less than or equal to
>= Greater than or equal to
== Equal to
!= Not equal to
&& Logical AND or short circuit AND
|| Logical OR or short circuit OR