This post provides a handy reference guide to go from Scratch’s “Operators” category of code blocks to C# with Unity.
Code Blocks
Click on the picture of any of these Scratch code blocks to see how to write similar code statements in C#.
int score = 5 + 6; // 11 int age = score + 1; // 12 int total = score + age; // 23 score += 1; // 12 score++; // 13
int score = 10 - 5; // 5 int age = score - 1; // 4 int total = score - age; // 1 score -= 1; // 4 score--; // 3
int score = 3 * 5; // 15 int age = score * 2; // 30 int total = score * age; // 450 score *= 3; // 45
int score = 10 / 3; // 3 double amount = 7.0 / 2.0; // 3.5 int total = score / score; // 1 score /= 3; // 1
int score = Random.Range(1, 11); // Could be one of [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] float time = Random.Range(0f, 1f); // Could be any value between 0 (inclusive) and 1 (inclusive) float amount = Random.value; // Could be any value between 0 (inclusive) and 1 (inclusive)
bool result = 10 > 3; // true result = 3 > 10; // false
bool result = 10 < 3; // false result = 3 < 10; // true
bool result = 10 == 10; // true result = 10 == 3; // false
bool result = true && true; // true result = true && false; // false result = false && true; // false result = false && false; // false
bool result = true || true; // true result = true || false; // true result = false || true; // true result = false || false; // false
bool test = false; // false test = !test; // true
string name = "Jon" + " the great!"; // "Jon the great!"
string firstName = "Jon";
string lastName = "Parham";
string fullName = string.Concat(firstName, " ", lastName); // "Jon Parham"
string[] fruits = { "banana", "grape", "strawberry" };
string allFruits = string.Join(", ", fruits); // "banana, grape, strawberry"
string name = "Jon"; string firstLetter = name.Substring(0, 1); // "J" string secondLetter = name.Substring(1, 1); // "o" string lastTwoLetters = name.Substring(1, 2); // "on"
string fruit = "apple"; int letterCount = fruit.Length; // 5
string fruit = "apple";
bool test = fruit.Contains("a"); // true
test = fruit.Contains("app"); // true
test = fruit.Contains("b"); // false
int mod = 10 % 3; // 1
float result = Mathf.Round(3.2f); // 3 result = Mathf.Round(3.7f); // 4
float result = Mathf.Abs(-3f); // 3
float result = Mathf.Floor(3.7f); // 3
float result = Mathf.Ceil(3.3f); // 4
float result = Mathf.Sqrt(4f); // 2
float result = Mathf.Sin(4f); // -0.7568025
float result = Mathf.Cos(4f); // -0.6536436
float result = Mathf.Tan(4f); // 1.157821
float result = Mathf.Asin(0.5f); // 0.5235988
float result = Mathf.Acos(0.5f); // 1.047198
float result = Mathf.Atan(0.5f); // 0.4636476
float result = Mathf.Log10(100f); // 2
float e = (float)System.Math.E; float result = Mathf.Pow(e, 2); // 7.389056
float result = Mathf.Pow(10, 2); // 100
Links
Here are a few links that are relevant to this material and can help you dive a little deeper if you need more help.
Summary
This should cover all of the code blocks in Scratch’s “Operators” category. If you have any questions about this reference guide feel free to ask below.
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