比较javascript中的小数

Question

im having issues comparing km distance, it saying in the example above, im comparing distance between locations, these locations are in km.

9,441.4<1500

The output is telling me that 9 thousand is less than 1 thousand. In my case, should i only put or add in 1500 the dot and comma to be 1,500.0, or there is more than just that?

Answer 1

You should remove the comma. You don't use a thousands separator in JavaScript numbers.

So why didn't it fail with a syntax error? Because it's valid syntax: JavaScript has a comma operator . Your code was the number 9, followed by the comma operator, followed by the comparison 441.4 < 1500 . The comma operator is one of JavaScript's more...interesting...operators: It evaluates the left-hand operand ( 9 in your example), throws away the resulting value, then evaluates its right-hand operand ( 441.4<1500 in your example) and takes the resulting value as the value of the comma operator expression.

You wanted:

9441.4<1500

Answer 2

As TJ Crowder said, you need to remove the comma, and convert the string to a floating point number:

$api_input = "9,441.4";

$tmp = str_replace( ",", "", $api_input);

$distance = floatval($tmp);