Decimal

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The following example illustrates use of the bitwise NOT (~) operator on decimal numbers.

To keep the example simple, decimal number 3.5 will be used, cause of it’s simple representation in binary format.

let number = 3.5;
let complement = ~number;

Result of the complement number equals to -4;

Expression | Binary value | Decimal value | —— | —— | —— | 3.5 | 00000000 00000010.1 | 3.5 | ~3.5 | 11111111 11111100 | -4 |

To simplify this, we can think of it as function f(n) = -(integer(n)+1).

let a = ~-2.5; // a is now 1
let b = ~-1.5; // b is now 0
let c = ~0.5;  // c is now -1
let d = ~1.5;  // c is now -2
let e = ~2.5;  // c is now -3

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