Assertion in javascript

In assertion,we have two arguments ,One is expectations statement and other is exact result we are trying to match ,its throws an exception,if expectations are not correct

1// Operators for booleans
2assert.equal(true && false, false); // And
3assert.equal(true || false, true); // Or
4// Operators for numbers
5assert.equal(3 + 4, 7);
6assert.equal(5 - 1, 4);
7assert.equal(3 * 4, 12);
8assert.equal(10 / 4, 2.5);
9// Operators for bigints
10assert.equal(3n + 4n, 7n);
11assert.equal(5n - 1n, 4n);
12assert.equal(3n * 4n, 12n);
13assert.equal(10n / 4n, 2n);
14// Operators for strings
15assert.equal('a' + 'b', 'ab');
16assert.equal('I see ' + 3 + ' humans', 'I see 3 humans');
17// Comparison operators
18assert.equal(3 < 4, true);
19assert.equal(3 <= 4, true);
20assert.equal('abc' === 'abc', true);
21assert.equal('abc' !== 'def', true);

Ordinary function declarations

1 // add1() has the parameters a and b
2function add1(a, b) {
3return a + b;
4}
5// Calling function add1()
6assert.equal(add1(5, 2), 7);