factors in C++
The concept of factors in C++
factors ( operators ) They are symbols that have a specific meaning, and we can divide the factors into 5 basic groups as follows:
Arithmetic Operators
Comparison Operators
Logical Operators
Bitwise Operators
Assignment Operators
There are also other factors, which we will see at the end of the lesson.
What factors are used in arithmetic operations? (Arithmetic Operators) in C++
| the name of the employee | his code | Example | Explanation of the code |
|---|---|---|---|
| Assignment | = | a = b | I give a a value b |
| Addition | + | a + b | Add value b to value a |
| Subtraction | - | a - b | Subtract a value b from a value a |
| Unary plus | + | +a | Multiply the value a by the factor + |
| Unary minus | - | -a | Multiply the value a by the factor - |
| Multiplication | * | a * b | multiply a value a by b |
| Division | / | a / b | Divide a value a by a value b |
| Modulo | % | a % b | To get the last digit that remains when we divide a value a by a value b |
| Increment | ++ | a++ | To add 1 to a value a and use it in loops |
| Decrement | -- | a-- | To decrement 1 from a value a and use in loops |
Factors that are used in arithmetic operations in C++
worker = (Assignment Operator) in C++
The operator = is used to assign a value to a variable.
Example
#include <iostream>
using namespace std;
int main()
{
int a = 5; // 5 the value a given the variable
int b = a; // a the value of the variable b we give the variable
cout << "a = " << a << endl;
cout << "b = " << b;
return 0;
}
• We will get the following result when running.
a = 5 b = 5
worker + (Addition Operator) in C++
The operator + is used to add a value to a value, ie in addition operations.
Example
#include <iostream>
using namespace std;
int main()
{
int a = 3;
int b = 4;
int c = a + b; // c = 3 + 4 = 7
cout << "c = " << c;
return 0;
}
• We will get the following result when running.
c = 7
worker - (Subtraction Operator) in C++
The operator - is used to decrement a value from a value, ie in subtraction operations.
Example
#include <iostream>
using namespace std;
int main()
{
int a = 3;
int b = 4;
int c = a - b; // c = 3 - 4 = -1
cout << "c = " << c;
return 0;
}
• We will get the following result when running.
c = -1
worker + (Unary-Plus Operator) in C++
It means multiplying the value by the factor +.
Example
#include <iostream>
using namespace std;
int main()
{
// b in the variable Unary-Plus has a value greater than zero, then we put the value of a here and we put it in the variable
int a = 10;
int b = +a; // b = +(10) = 10
cout << "b = " << b << endl;
// b in the variable Unary-Plus has a value less than zero, then we put the value of a here and we put it in the variable
a = -10;
b = +a; // b = +(-10) = -10
cout << "b = " << b;
return 0;
}
• We will get the following result when running.
b = 10 b = -10
worker - (Unary-Minus Operator) in C++
It means multiplying the value by the factor -.
Example of multiplying the value by the factor
#include <iostream>
using namespace std;
int main()
{
// b in the variable Unary-Minus has a value greater than zero, then we put the value of a here and we put it in the variable
int a = 10;
int b = -a; // b = -(10) = -10
cout << "b = " << b << endl;
// b in the variable Unary-Minus has a value less than zero, then we put the value of a here and we put it in the variable
a = -10;
b = -a; // b = -(-10) = 10
cout << "b = " << b;
return 0;
}
• We will get the following result when running.
b = -10 b = 10
worker * (Multiplication Operator) in C++
The operator * is used to multiply a value by a value, ie in multiplication operations.
Example of multiplying a value by
#include <iostream>
using namespace std;
int main()
{
int a = 6;
int b = 5;
int c = a * b; // c = 6 * 5 = 30
cout << "c = " << c;
return 0;
}
• We will get the following result when running.
c = 30
worker / (Division Operator) in C++
The operator / is used to divide a value by a value, ie in division operations.
Example of dividing a value by a value
#include <iostream>
using namespace std;
int main()
{
int a = 8;
int b = 5;
int c = a / b; // c = 8 / 5 = 1
cout << "c = " << c;
return 0;
}
• We will get the following result when running.
c = 1
• Note: The reason why no numbers appear after the comma is that we defined the variables as integers int.
worker % (Modulo Operator) in C++
The worker % is called Modulo And it's called Reminder In mathematics, it is the last number remaining in the division process.
So we use the Modulo To get the last remaining number of division.
And it has many benefits, for example, we can use it to find out whether a number is single or double ( Which Even or Odd ) And this we explained in detail in the article Algorithms.
In this example, we will store the number that remains from the division in the variable c.
An example of storing the number that remains from division in the variable c.
#include <iostream>
using namespace std;
int main()
{
int a = 8;
int b = 5;
int c = a % b; // c = 8 % 5 = 3
cout << "c = " << c;
return 0;
}
• We will get the following result when running.
c = 3
worker ++ (Increment Operator) in C++
The operator ++ is used to increment the value of a variable by one, and this method is often used in loops to increase the value of the counter by one per cycle with less code.
Example of increasing the value of a variable by one
#include <iostream>
using namespace std;
int main()
{
int a = 5;
a++; // a = 5 + 1 = 6
cout << "a = " << a;
return 0;
}
• We will get the following result when running.
a = 6
worker -- (Decrement Operator) in C++
The operator -- is used to decrement the value of a variable by one, and this method is often used in loops to decrement the value of the counter by one per cycle with less code.
Example of decreasing the value of a variable by one
#include <iostream>
using namespace std;
int main()
{
int a = 5;
a--; // a = 5 - 1 = 4
cout << "a = " << a;
return 0;
}
• We will get the following result when running.
a = 4