How to use scientific notation in js?

Question

var a = 5.0;
var b = a * 10e-12;
b *= 10e+12
print(b)

Why b equals 500 instead of 5?

As far as I know 10^(-12) equals to 1/(10^12), how can

Answer 1

Because math. 10e1 is 100 and 10e-1 is 1.

• 10e1 * 10e-1 is 100.
• 10e2 * 10e-2 is 100.
• 10e3 * 10e-3 is 100.

You can very easily extend this to figure out that 10eN * 10e-N is always going to be 100.

If you want actual scientific notation, as in 1 * 10 ^ 2, you want 1e12 and 1e-12.