Text and TextMeshPro in Unity - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the text of a UI Text component.

Unity

using UnityEngine;
using UnityEngine.UI;

public class Example : MonoBehaviour {
    public Text uiText;

    void Start() {
        uiText.[1] = "Hello World!";
    }
}

Drag options to blanks, or click blank then click option'

Acontent

Btext

Cvalue

Dstring

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'content' or 'value' instead of 'text' property.

The Text component uses the text property to set its displayed string.

2fill in blank

medium

Complete the code to set the text of a TextMeshProUGUI component.

Unity

using TMPro;
using UnityEngine;

public class Example : MonoBehaviour {
    public TextMeshProUGUI tmpText;

    void Start() {
        tmpText.[1] = "Welcome to TextMeshPro!";
    }
}

Drag options to blanks, or click blank then click option'

Acontent

Bstring

Cvalue

Dtext

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to use 'content' or 'value' instead of 'text'.

TextMeshProUGUI uses the text property to set the displayed string, similar to the UI Text component.

3fill in blank

hard

Fix the error in the code to change the font size of a TextMeshProUGUI component.

Unity

using TMPro;
using UnityEngine;

public class Example : MonoBehaviour {
    public TextMeshProUGUI tmpText;

    void Start() {
        tmpText.fontSize [1] 36;
    }
}

Drag options to blanks, or click blank then click option'

A+=

B==

C=

D:=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '==' instead of '=' causes a syntax error.

To assign a new font size, use the assignment operator =. Using == is a comparison, not assignment.

4fill in blank

hard

Fill both blanks to create a dictionary mapping words to their lengths, but only include words longer than 4 characters.

Unity

var words = new string[] {"apple", "cat", "banana", "dog"};
var lengths = new Dictionary<string, int>() {
    {"apple", 5},
    {"banana", 6}
};

var filteredLengths = new Dictionary<string, int>();
foreach (var word in words) {
    if (word.[1] > 4) {
        filteredLengths[word] = word.[2];
    }
}

Drag options to blanks, or click blank then click option'

ALength

BCount

CLength()

DCount()

Attempts:

3 left

💡 Hint

Common Mistakes

Using Length() or Count() which are invalid for strings.

In C#, strings have a Length property (without parentheses) to get their length.

5fill in blank

hard

Fill all three blanks to create a dictionary from words to their uppercase forms, but only include words starting with 'a'.

Unity

var words = new string[] {"apple", "banana", "avocado", "cherry"};
var result = new Dictionary<string, string>();
foreach (var word in words) {
    if (word.[1]('a')) {
        result[[2]] = word.[3]();
    }
}

Drag options to blanks, or click blank then click option'

AStartsWith

Bword

CToUpper

DContains

Attempts:

3 left

💡 Hint

Common Mistakes

Using Contains instead of StartsWith.

Forgetting parentheses on ToUpper().

Use StartsWith('a') to check the first letter, use word as the dictionary key, and ToUpper() to convert the word to uppercase.

Practice

1. Which component in Unity provides sharper and more customizable text rendering compared to the basic Text component?

easy

A. Sprite Renderer

B. Canvas Renderer

C. TextMeshPro

D. Audio Source

Solution

1. Step 1: Understand Unity text components

   Unity has a basic Text component and a more advanced TextMeshPro component for displaying text.

2. Step 2: Identify which is sharper and customizable

   TextMeshPro is designed to provide sharper, clearer text with more customization options than the basic Text component.

3. Final Answer:

   TextMeshPro -> Option C

4. Quick Check:

   Sharper text = TextMeshPro [OK]

Hint: TextMeshPro is the advanced text component in Unity [OK]

Common Mistakes:

• Confusing Canvas Renderer with text rendering
• Thinking Sprite Renderer handles text
• Choosing Audio Source which is unrelated

2. Which of the following is the correct way to change the displayed text of a TextMeshPro component in a Unity C# script?

easy

A. myText.display = "Hello World!";

B. myText.SetText = "Hello World!";

C. myText.content = "Hello World!";

D. myText.text = "Hello World!";

Solution

1. Step 1: Recall TextMeshPro text property usage

   TextMeshPro components have a public property called 'text' to set the displayed string.

2. Step 2: Identify correct syntax

   Assigning a string directly to 'text' like myText.text = "Hello World!"; is correct and common.

3. Final Answer:

   myText.text = "Hello World!"; -> Option D

4. Quick Check:

   Set text with .text property [OK]

Hint: Use .text property to set displayed text [OK]

Common Mistakes:

• Using SetText() which exists but is a method, not property assignment
• Using non-existent properties like content or display
• Missing quotes around string

3. What will be the output on screen after running this Unity C# code snippet if myText is a TextMeshProUGUI component?

myText.text = "Score: " + 10 + 5;

medium

A. Score: 15

B. Score: 105

C. Score: 10 5

D. Score: 10+5

Solution

1. Step 1: Understand string concatenation in C#

   When using + with a string and numbers, numbers are converted to strings and concatenated left to right.

2. Step 2: Evaluate expression "Score: " + 10 + 5

   "Score: " + 10 becomes "Score: 10", then + 5 becomes "Score: 105" as 5 is appended as string.

3. Final Answer:

   Score: 105 -> Option B

4. Quick Check:

   String + numbers concatenates left to right [OK]

Hint: String + numbers concatenate as strings left to right [OK]

Common Mistakes:

• Assuming 10 + 5 adds first before string concatenation
• Expecting spaces between numbers automatically
• Thinking + signs appear in output

4. You wrote this code to update a TextMeshProUGUI text but it doesn't change on screen:

public TextMeshProUGUI myText;

void Start() {
    myText.text = "Game Over";
}

What is the most likely reason?

medium

A. The myText variable is not assigned in the Inspector

B. TextMeshProUGUI does not have a text property

C. You must call Refresh() after setting text

D. The text must be set in Update(), not Start()

Solution

1. Step 1: Check common setup mistakes

   If myText is not assigned in the Inspector, the script has a null reference and text won't update.

2. Step 2: Verify other options

   TextMeshProUGUI has a text property; no Refresh() needed; setting text in Start() works fine.

3. Final Answer:

   The myText variable is not assigned in the Inspector -> Option A

4. Quick Check:

   Assign UI references in Inspector [OK]

Hint: Always assign UI variables in Inspector before running [OK]

Common Mistakes:

• Assuming text property doesn't exist
• Thinking Refresh() is required
• Believing Start() is too early to set text

5. You want to display a player's health as text using TextMeshProUGUI and update it every frame. Which code snippet correctly updates the text to show "Health: " followed by the current health integer stored in playerHealth?

hard

A. All of the above

B. void Update() { myText.text = "Health: " + playerHealth.ToString(); }

C. void Update() { myText.text = string.Format("Health: {0}", playerHealth); }

D. void Update() { myText.text = $"Health: {playerHealth}"; }

Solution

1. Step 1: Review ways to convert int to string in C#

   playerHealth is an int; to display it, convert to string or use string interpolation or formatting.

2. Step 2: Check each option

   B uses + and ToString(), C uses string.Format(), D uses string interpolation with $"..."; all work.

3. Step 3: Confirm all are correct

   All three methods correctly update the text with the health value.

4. Final Answer:

   All of the above -> Option A

5. Quick Check:

   Multiple string methods work for text update [OK]

Hint: Use any string conversion method to update text [OK]

Common Mistakes:

• Forgetting to convert int to string
• Using incorrect string syntax
• Updating text outside Update() when dynamic