Confusion about result '-1299'

PHP
1

Hi!
Can some one explain why result ‘-1299’ is shown after executing following statment.


$var = 1 + "-1.3e3";

var_dump($var);

Thanks in advance

2

What did you expect it to show? The explanation is 1 - 1300 = -1299

3

Already answered, but out of curiosity, what are you wanting to occur instead?

4

Thanks for reply. My confuion is how “1.3e3” is actually 1300.

5

Does expanding it out to 1.3 * 10^3 help?
A bit of a study of http://en.wikipedia.org/wiki/Scientific_notation#E_notation might help too.

6

Scientific notation, it actually reads as 1.3 x 10 ^ 3. PHP recognizes this as a number when casting from a string.

7

Really thanks for your help.