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C# Basics
C# Basics
Comparison Operators
Before diving into control structures, we need to understand some operators. The first set of operators we will look at are called Comparison Operators.
As expressed by the name, the comparison operators are used for comparing values. Following is a list of all the comparison operators:
Operator | Operation |
== | Equal To |
!= | Not Equal To |
> | Greater Than |
< | Less Than |
>= | Greater Than or Equal To |
<= | Less Than or Equal To |
Using comparison operators we can create logical expressions that return logical values, such as true
or false
. For-example the expression 5 < 1
will output false
as 5
is not greater than 1
.
Note
We can directly put expressions in the Console.Write methods.
main
using System; namespace ConsoleApp { internal class Program { static void Main(string[] args) { Console.WriteLine(5 < 1); // Output: False } } }
Following are some more examples of expressions formed using comparison operators:
main
using System; namespace ConsoleApp { internal class Program { static void Main(string[] args) { Console.WriteLine(1 == 2); // Output: False Console.WriteLine(2 == 2); // Output: True Console.WriteLine(5 < 10); // Output: True Console.WriteLine(5 < 5); // Output: False (5 is NOT less than 5) Console.WriteLine(5 <= 5); // Output: True Console.WriteLine(5 >= 5); // Output: True Console.WriteLine(7 != 9); // Output: True } } }
We can also put variables in these expressions:
main
using System; namespace ConsoleApp { internal class Program { static void Main(string[] args) { int value_1 = 7; int value_2 = 9; Console.WriteLine(value_1 == value_2); // Output: False Console.WriteLine(value_1 > value_2); // Output: False Console.WriteLine(value_1 < value_2); // Output: True Console.WriteLine(value_2 > 5); // Output: True } } }
We can store the results of the logical expressions into bool
variables since boolean variables can hold a value of true
or false
:
main
using System; namespace ConsoleApp { internal class Program { static void Main(string[] args) { int x = 5; int y = 7; bool result = x > y; Console.WriteLine(result); // Output: False } } }
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