Dart Division

​

Type Signature

double operator /(num other);

​

Mechanical Behavior

• Strict Return Type: Unlike languages (such as C or Java) where dividing two integers implicitly performs truncating integer division, Dart’s / operator always yields a double. If integer division is required, Dart requires the use of the distinct truncating division operator (~/).
• Operand Types: The operator accepts any subtype of num (int or double) for both the left and right operands.
• IEEE 754 Compliance: The evaluation adheres to the IEEE 754 standard for floating-point arithmetic.
• Division by Zero: The / operator does not throw a runtime exception (such as IntegerDivisionByZeroException) when dividing by zero. Instead, it returns standard IEEE 754 floating-point constants:
  • A positive number divided by 0 evaluates to double.infinity.
  • A negative number divided by 0 evaluates to double.negativeInfinity.
  • 0 divided by 0 evaluates to double.nan (Not-a-Number).

​

Syntax Visualization

// Integer operands
int a = 10;
int b = 4;
double result1 = a / b; // Evaluates to 2.5

// Perfectly divisible integers still return a double
double result2 = 10 / 2; // Evaluates to 5.0

// Floating-point operands
double c = 5.5;
double d = 2.0;
double result3 = c / d; // Evaluates to 2.75

// Division by zero behavior
double inf = 5 / 0;     // Evaluates to Infinity
double negInf = -5 / 0; // Evaluates to -Infinity
double nan = 0 / 0;     // Evaluates to NaN