how can I remove zeros from exponent notation

Question

I'm using exponential formatting to format a decimal number in C#. For example if the number is

0.0001234567

Formatting with

(0.0000123456).ToString("E4");

Shows

1.2345E-004

How can I remove leading zero from exponent so it read as below?

1.2345E-4

Answer 1

Assuming you need to always show 4 digits after decimal point, try

"0.0000E+0"

so it will show

(0.0000123456).ToString("0.0000E+0"); //1.2345E-5 
(0.0000120000).ToString("0.#E+0");    //1.2000E-5

if you don't need to show 4 digits after decimal points use

"0.#E+0"

so it will show

(0.0000123456).ToString("0.#E+0"); //1.2E-5
(0.0000120000).ToString("0.#E+0"); //1.2E-5