Cấu trúc rẽ nhánh (if-else) trong Dart

1. If statement


var age = 18;
 
if (age >= 18) {
  print("Adult");
}

2. If-else


if (age >= 18) {
  print("Adult");
} else {
  print("Minor");
}

3. If-else if-else


var score = 85;
 
if (score >= 90) {
  print("A");
} else if (score >= 80) {
  print("B");
} else if (score >= 70) {
  print("C");
} else {
  print("F");
}

4. Ternary Operator


var age = 20;
var status = age >= 18 ? "Adult" : "Minor";

5. Logical Operators


var age = 25;
var hasLicense = true;
 
if (age >= 18 && hasLicense) {
  print("Can drive");
}
 
if (age < 18 || !hasLicense) {
  print("Cannot drive");
}

📝 Tóm tắt

if-else if-else - Conditional branching
condition ? a : b - Ternary operator
&&, ||, ! - Logical operators

Last updated on December 25, 2025

Toán tử logic (Logical Operators)Toán tử ba ngôi (Ternary Operator)