Chapter 3
The Operators in C
In this lecture, we will try to use C programs as calculators.
We are interestedin arithmetic operations. These operations include
the following:
1. Addition / Plus ( Example: 10+2, 2.57-5.67 )
2. Subtraction / Minus ( Example 30-3, 45.89-34.3)
3. Multiplication (10*3, 2.3*4.0)
4. Division (10/2, 15.0/4.0)
These operators have a general form. Each operator (+,, , /) has
twooperands in each side and the operator sign is in the middle.
They take twooperands. They are called binary operators since they
take only two operands.The operands are generally numbers. There
are two types of numbers in C:whole numbers, which we call
integers. They do not have any fractional parts.Example: 0, 1,3.
There are other types of numbers with fractional parts. Wecall them
floating point numbers. An operator along with its operands forman
arithmetic expression. An operator working on a number also gives
us anumber. For example, 3 + 2 yields 5. Now in C, we wish to
perform suchoperations and print the value of such expressions in
the console using printf()function. How can we do that?
3.1 Format Specifier
In this section, we will learn about the format specifiers in C
that helps us toprint any number in the screen or console. Consider
the following program:
#include
int main()
{
3
