fromStringOr

public static double fromStringOr(string numberAsStr, double defaultValue)

The double equivalent of the string value or the provided default value if the string is not a numeric value.

Parameters

numberAsStr

The string value to convert.

defaultValue

The default value to return if the conversion fails.

Converts a string to its equivalent double value or the provided default value if the conversion fails.

import System;

double x = Double.fromStringOr("100", 101);
Console.log(x); // 100 // conversion succeeded
double y = Double.fromStringOr("abc", 101);
Console.log(y); // 101 // conversion failed so default value returned

The default value is also returned if the numeric string value falls outside the range of the double data type (-1.79769313486232e308 to 1.79769313486232e308).

import System;

double tooBig = Double.fromStringOr("1e400", 100);
Console.log(tooBig); // 100

If the Double.NaN (IEEE-754 Not a Number) value is desired, a string value of NaN will return this value and not the specified default value:

import System;

double y = Double.fromStringOr("NaN", 100);
Console.log(y); // Double.NaN

1 2 3 4 5 6

import System;   double valid = Double.fromStringOr("100", 23); Console.log(valid); // 100 double invalid = Double.fromStringOr("abc", 24); Console.log(invalid); // 24