{"id":23,"date":"2021-06-18T17:33:57","date_gmt":"2021-06-18T10:33:57","guid":{"rendered":"https:\/\/csharptutorial.net\/?page_id=23"},"modified":"2022-01-22T09:47:36","modified_gmt":"2022-01-22T02:47:36","slug":"csharp-if","status":"publish","type":"page","link":"https:\/\/www.csharptutorial.net\/csharp-tutorial\/csharp-if\/","title":{"rendered":"C# if"},"content":{"rendered":"\n

Summary<\/strong>: in this tutorial, you’ll learn how to use the C# if statement to execute a code block based on a condition.<\/p>\n\n\n\n

Introduction to the C# if statement<\/h2>\n\n\n\n

The if<\/code> statement evaluates a condition and executes one or more statements if the result is true<\/code>. Otherwise, the if<\/code> statement passes the control to the statement after it.<\/p>\n\n\n\n

The following illustrates the syntax of the if<\/code> statement:<\/p>\n\n\n

if<\/span> (condition)\n    statement;<\/code><\/span>Code language:<\/span> C#<\/span> (<\/span>cs<\/span>)<\/span><\/small><\/pre>\n\n\n
In this syntax, if the condition<\/code> evaluates to true<\/code>, then if<\/code> statement executes the statement<\/code>. <\/p>\n\n\n\n
If you want to execute multiple statements, you need to use a block like this:<\/p>\n\n\n
if<\/span> (expression) {\n    \/\/ statements<\/span>\n}<\/code><\/span>Code language:<\/span> C#<\/span> (<\/span>cs<\/span>)<\/span><\/small><\/pre>\n\n\n
However, it’s a good practice to always use a block with the if<\/code> statement even though it has a simple statement.<\/p>\n\n\n\n
The following flowchart illustrates how the C# if<\/code> statement works:<\/p>\n\n\n\n
\"\"<\/figure><\/div>\n\n\n\n
C# if statement examples<\/h2>\n\n\n\n
Let’s take some examples of using the if<\/code> statement.<\/p>\n\n\n\n
1) A simple C# if statement example<\/h3>\n\n\n\n
The following example uses the if<\/code> statement to show a message when the condition is sunny:<\/p>\n\n\n
string<\/span> condition = \"sunny\"<\/span>;\n\nif<\/span> (condition == \"sunny\"<\/span>)\n{\n    Console.WriteLine(\"Let's go outside.\"<\/span>);\n}<\/code><\/span>Code language:<\/span> C#<\/span> (<\/span>cs<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
Let's go outside.<\/span><\/code><\/span>Code language:<\/span> C#<\/span> (<\/span>cs<\/span>)<\/span><\/small><\/pre>\n\n\n
How it works.<\/p>\n\n\n\n