The value to check.
true if the value is null, otherwise false.
// Example 1: Checking a null value
const result1 = isNull(null);
console.log(result1); // true
// Example 2: Checking an undefined value
const result2 = isNull(undefined);
console.log(result2); // false
// Example 3: Checking a non-null value
const result3 = isNull(42);
console.log(result3); // false
// Example 4: Checking an empty object
const result4 = isNull({});
console.log(result4); // false
Checks if a value is null.
This function evaluates whether the provided value is strictly equal to
null.