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Part 2 – Reading and writing to console
Part 3 – Built-in types
Part 4 – String type
In this video, we will discuss the common operators that are available in c# programming language.
Assignment Operator =
Arithmetic Operators like +,-,*,/,%
Comparison Operators like ==, !=,>, >=, <, <=
Conditional Operators like &&, ||
Ternary Operator ?:
Null Coalescing Operator ??
Examples used in the demo
using System;
namespace ConsoleApplication1
{
class Program
{
public static void Main()
{
// Assignment Operator example
// Single = is the assignment operator
int i = 10;
bool b = true;
// For dividing 2 numbers we can use either
// % or / operators
int numerator = 10;
int denominator = 2;
// Arithmentic operator / returns quotient
int quotient = numerator / denominator;
Console.WriteLine(“Quotient = {0}”, quotient);
// Arithmentic operator % returns remainder
int remainder = numerator % denominator;
Console.WriteLine(“Remainder = {0}”, remainder);
// To compare if 2 numbers are
// equal use comparison operator ==
int number = 10;
if (number == 10)
{
Console.WriteLine(“Number is equal to 10”);
}
// To compare if 2 numbers are not
// equal use comparison operator !=
if (number != 5)
{
Console.WriteLine(“Number is not equal to 5”);
}
// When && operator is used all the conditions must
// be true for the code in the “if” block to be executed
int number1 = 10;
int number2 = 20;
if (number1 == 10 && number2 == 20)
{
Console.WriteLine(“Both conditions are true”);
}
// When || operator is used the code in the “if” block
// is excuted if any one of the condition is true
number1 = 10;
number2 = 21;
if (number1 == 10 || number2 == 20)
{
Console.WriteLine(“Atleast one of the condition is true”);
}
}
}
}
The example below is not using the ternary operator. Look at the amount of code we have to write to check if a number is equal to 10, and then initialise a boolean variable to true or false depending on whether the number is equal to 10 or not.
using System;
namespace ConsoleApplication1
{
class Program
{
public static void Main()
{
int number = 10;
bool isNumber10;
if (number == 10)
{
isNumber10 = true;
}
else
{
isNumber10 = false;
}
Console.WriteLine(“Number == 10 is {0}”, isNumber10);
}
}
}
Ternary operator example : We have rewritten the above program using ternary operator. Notice the amount of code we have to write is greatly reduced.
using System;
namespace ConsoleApplication1
{
class Program
{
public static void Main()
{
int number = 10;
// Ternary operator example
bool isNumber10 = number == 10 ? true : false;
Console.WriteLine(“Number == 10 is {0}”, isNumber10);
}
}
}
[youtube https://www.youtube.com/watch?v=xFWwWcZ74gU?rel=0&showinfo=0&w=560&h=315]
