Comparison Operators
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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:
Using comparison operators, you can create logical expressions that return true or false. For-example the expression 5 < 1 will output false as 5 is greater than 1.
We can directly put expressions in the Console.Write methods.
main.cs
123456789101112using 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.cs
123456789101112131415161718using 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 } } }
You can also put variables in these expressions.
main.cs
123456789101112131415161718using 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 } } }
You can store the results of the logical expressions into bool variables since boolean variables can hold a value of true or false:
main.cs
12345678910111213141516using 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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