Here are a few question-based titles for your article, focusing on the key points you made: * Why Does `x | 0` Always Return `x` in JavaScript? * How Does the Bitwise OR Operator with Zero (`| 0`) Wo

Bitwise OR Operator in JavaScript

JavaScript provides a bitwise operator represented by the single pipe symbol (|). This operator performs a bitwise OR operation on its operands, which are typically integers.

Behavior of x | 0

When used with an integer x, the expression x | 0 always returns x because bitwise OR with zero does not change the value. This behavior holds regardless of the sign of x.

Example:

<code class="js">console.log(0.5 | 0); // 0
console.log(-1 | 0);  // -1
console.log(1 | 0);   // 1</code>

Explanation:

• 0.5 | 0: 0.5 is not an integer, so it is truncated to 0. Then, bitwise OR with 0 has no effect, resulting in 0.
• -1 | 0: -1 is an integer, so bitwise OR with 0 simply returns -1.
• 1 | 0: Same as for -1, bitwise OR with 0 does not affect 1.

Purpose of | 0

The | 0 operation is commonly used to:

• Convert a floating-point number to an integer by truncating the decimal part.
• Remove the sign from an integer by performing bitwise OR with 0.

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