what does Math.trunc do code example

Example: js math.trunc

The Math.trunc() function 
returns the integer part of a number by removing any fractional digits.

console.log(Math.trunc(13.37));
// expected output: 13
console.log(Math.trunc(42.84));
// expected output: 42
console.log(Math.trunc(0.123));
// expected output: 0
console.log(Math.trunc(-0.123));
// expected output: -0