The second string is the text to replace it with. The first string is the text to search for. These are the strings between the parentheses. It searches for a substring and replaces it with different text. The Replace method does something similar in a string. For example, you've probably used a search and replace command in an editor or word processor before. There are other methods available to work with a string.
You can see that each call to any of the Trim methods returns a new string but doesn't change the original message. The methods that manipulate strings return new string objects rather than making modifications in place. This sample reinforces a couple of important concepts for working with strings. The brackets show where whitespace starts and ends. The square brackets help visualize what the Trim, TrimStart and TrimEnd methods do. You've been using + to build strings from variables and constant strings. Modify the lines that print the message to the following: Console.WriteLine("Hello " + aFriend) You may have also noticed that the word "Hello" was missing in the last two messages. The value stored in the aFriend variable.
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Notice that the same line of code prints two different messages, based on Of the aFriend variable and its initial assignment. Add these two lines in the interactive windowįollowing the code you've already added. You can assign different values to any variable you declare. The first line declares a variable, aFriend, and assigns it a value, "Bill". Let's try it! Replace theĬode you've written in the interactive window with the following code: string aFriend = "Bill" Use to run the same code with different values.
Your first program is limited to printing one message. That exercise will help you learn the structure of C# code. When the outputĬontains error messages, look closely at the example code,Īnd the code in the interactive window to see what to fix. The compiler willįind those errors and report them to you. As you explore C# (or any programming language), you'll
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