## When do we use double.INFINITY?

In Dart (and Flutter), `double.INFINITY`

is a constant representing positive infinity for double-precision floating-point numbers. It is used to represent a value that is larger than any other finite floating-point number. Essentially, `double.INFINITY`

is a special value that denotes “unbounded” or “infinite” in the context of numeric calculations.

You would typically use `double.INFINITY`

in the following scenarios:

**Mathematical Operations:**When performing mathematical operations, you might encounter cases where a result exceeds the range of finite floating-point numbers. For example, if you divide a non-zero number by zero, the result is infinity. You can use`double.INFINITY`

to represent such scenarios in your calculations.

```
double result = 5.0 / 0.0; // result is double.INFINITY
```

**Comparisons and Limits:**`double.INFINITY`

is useful when you want to set a value as the upper bound in a range check or a limit. For instance, you can use it to represent the maximum possible value for a calculation or to handle values that are not limited.

```
double maxValue = double.INFINITY;
if (value > maxValue) {
// Perform some action for values greater than the maximum allowed.
}
```

**Sentinels in Algorithms:**In some algorithms or data structures, you may need a special value to represent unbounded or infinite conditions. In such cases,`double.INFINITY`

can be used as a sentinel value to denote these special conditions.

```
double findMaxValue(List<double> values) {
double maxValue = double.NEGATIVE_INFINITY;
for (double value in values) {
if (value > maxValue) {
maxValue = value;
}
}
if (maxValue == double.NEGATIVE_INFINITY) {
// Handle the case when the list is empty or all values are negative.
// This can be considered as "no maximum" or "undefined."
}
return maxValue;
}
```

It’s important to note that operations involving infinity can lead to special floating-point results, such as NaN (Not a Number) or Infinity. When using `double.INFINITY`

, it’s essential to handle these special cases in your code to avoid unexpected behavior or errors.

In summary, `double.INFINITY`

is used in Dart/Flutter to represent positive infinity in calculations, comparisons, and scenarios where a value is unbounded or exceeds the range of finite floating-point numbers.