Common string methods in C Sharp (C#) - Mini Project: Build & Apply

Common string methods

📖 Scenario: You are working on a simple text processing tool that helps users analyze and modify their input strings.

🎯 Goal: Build a program that uses common string methods to check, modify, and display information about a given string.

📋 What You'll Learn

Create a string variable with a specific sentence.

Create a variable to hold a substring to search for.

Use string methods to check if the substring is in the string and to convert the string to uppercase.

Print the results clearly.

💡 Why This Matters

🌍 Real World

String methods like these are used in text editors, search tools, and data validation to process and analyze text.

💼 Career

Knowing common string methods is essential for software developers, data analysts, and anyone working with text data.

1

Create the initial string

Create a string variable called sentence and set it to the exact value "Learning C# is fun and useful".

C Sharp (C#)

# Create the string variable 'sentence' with the given text
// Your code here

Need a hint?

Use string sentence = "Learning C# is fun and useful"; to create the variable.

2

Add a substring to search for

Create a string variable called searchWord and set it to the exact value "fun".

C Sharp (C#)

string sentence = "Learning C# is fun and useful";
// Create the string variable 'searchWord' with the value "fun"
// Your code here

Need a hint?

Use string searchWord = "fun"; to create the variable.

3

Check if the substring is in the string and convert to uppercase

Create a boolean variable called containsWord that uses sentence.Contains(searchWord) to check if searchWord is in sentence. Then create a string variable called upperSentence that stores sentence.ToUpper().

C Sharp (C#)

string sentence = "Learning C# is fun and useful";
string searchWord = "fun";
// Create 'containsWord' using sentence.Contains(searchWord)
// Create 'upperSentence' using sentence.ToUpper()
// Your code here

Need a hint?

Use bool containsWord = sentence.Contains(searchWord); and string upperSentence = sentence.ToUpper();.

4

Print the results

Write two Console.WriteLine statements: one to print "Contains 'fun': " followed by containsWord, and another to print "Uppercase sentence: " followed by upperSentence.

C Sharp (C#)

string sentence = "Learning C# is fun and useful";
string searchWord = "fun";
bool containsWord = sentence.Contains(searchWord);
string upperSentence = sentence.ToUpper();
// Print if sentence contains the word
// Print the uppercase version of sentence
// Your code here

Need a hint?

Use Console.WriteLine("Contains 'fun': " + containsWord); and Console.WriteLine("Uppercase sentence: " + upperSentence);.