Why write 1,000,000,000 as 1000*1000*1000 in C?
c, integer, literals, objective-c
Solution
One reason to declare constants in a multiplicative way is to improve readability, while the run-time performance is not affected. Also, to indicate that the writer was thinking in a multiplicative manner about the number.
Consider this:
double memoryBytes = 1024 * 1024 * 1024;
It's clearly better than:
double memoryBytes = 1073741824;
as the latter doesn't look, at first glance, the third power of 1024.
As Amin Negm-Awad mentioned, the `^` operator is the binary `XOR`. Many languages lack the built-in, compile-time exponentiation operator, hence the multiplication.
Problem
In code created by Apple, there is this line: ``` CMTimeMakeWithSeconds( newDurationSeconds, 1000*1000*1000 ) ``` Is there any reason to express `1,000,000,000` as `1000*1000*1000`? Why not `1000^3` for that matter?