Condition

Comparison operators compare two values and produce a boolean result — either true or false. They are used to build conditions in if/else statements, loops, and anywhere a decision needs to be made.

For a broader introduction to operators, see Operators.

Operators#

Examples#

int score = 7;

Console.WriteLine(score == 10);  // false
Console.WriteLine(score != 10);  // true
Console.WriteLine(score > 5);    // true
Console.WriteLine(score < 5);    // false
Console.WriteLine(score >= 7);   // true
Console.WriteLine(score <= 6);   // false

score = 7

print(score == 10)  # False
print(score != 10)  # True
print(score > 5)    # True
print(score < 5)    # False
print(score >= 7)   # True
print(score <= 6)   # False

let score = 7;

console.log(score === 10);  // false
console.log(score !== 10);  // true
console.log(score > 5);     // true
console.log(score < 5);     // false
console.log(score >= 7);    // true
console.log(score <= 6);    // false

Logical operators combine or invert boolean conditions. They are used to build compound conditions — checks that require more than one thing to be true at the same time, or where either of two things being true is enough.

For a broader introduction to operators, see Operators.

AND#

The AND operator returns true only when both conditions are true. If either is false, the result is false.

int score = 7;
bool result = score > 5 && score < 10;  // true

score = 7
result = score > 5 and score < 10  # True

let score = 7;
let result = score > 5 && score < 10;  // true

OR#

The OR operator returns true when at least one condition is true. It only returns false when both are false.

A while loop repeats a block of code as long as a condition is true. Each time the block finishes, the condition is checked again. When it becomes false, the loop stops.

For a broader introduction to loops, see Loop.

  ┌─────────────────┐
  │   check condition│◄──────┐
  └────────┬────────┘        │
      true │  false          │
           ▼      ▼          │
    ┌────────────┐  exit      │
    │ loop body  │───────────┘
    └────────────┘

Basic While Loop#

int count = 0;

while (count < 3)
{
    Console.WriteLine(count);
    count++;
}