Welcome to Juan's Lab 2

1	2	3	4	5	6	7	8	9	10
2	4	6	8	10	12	14	16	18	20
3	6	9	12	15	18	21	24	27	30
4	8	12	16	20	24	28	32	36	40
5	10	15	20	25	30	35	40	45	50
6	12	18	24	30	36	42	48	54	60
7	14	21	28	35	42	49	56	63	70
8	16	24	32	40	48	56	64	72	80
9	18	27	36	45	54	63	72	81	90
10	20	30	40	50	60	70	80	90	100

1 + 2 is 3 (integer)

1 . 2 is 12 (string)

1 + 2 is 3 (double)

1 . 2 is 12 (string)

Why does an integer and a double result in a double?

An integer and a double results in a double due to type juggling. This happens to maintain accuracy, and it can be prevented by typecasting.

Warning: A non-numeric value encountered in /home/stu/jtrigueros/public_html/wk2/lab2.php on line 74

Warning: A non-numeric value encountered in /home/stu/jtrigueros/public_html/wk2/lab2.php on line 74

1.0 word + 2 is 3 (double)

1.0 word . 2 is 1.0 word2 (string)

Why does a string and an integer result in a double?

A string and an integer results in a double here due to PHP parsing. It sees the 1.0 at the beginning and assumes it is a double numerical value, and, similar to above, the double and integer became a double.

Fatal error: Uncaught TypeError: Unsupported operand types: string + float in /home/stu/jtrigueros/public_html/wk2/lab2.php:86 Stack trace: #0 {main} thrown in /home/stu/jtrigueros/public_html/wk2/lab2.php on line 86

1	2	3	4	5	6	7	8	9	10
2	4	6	8	10	12	14	16	18	20
3	6	9	12	15	18	21	24	27	30
4	8	12	16	20	24	28	32	36	40
5	10	15	20	25	30	35	40	45	50
6	12	18	24	30	36	42	48	54	60
7	14	21	28	35	42	49	56	63	70
8	16	24	32	40	48	56	64	72	80
9	18	27	36	45	54	63	72	81	90
10	20	30	40	50	60	70	80	90	100

1	2	3	4	5	6	7	8	9	10
2	4	6	8	10	12	14	16	18	20
3	6	9	12	15	18	21	24	27	30
4	8	12	16	20	24	28	32	36	40
5	10	15	20	25	30	35	40	45	50
6	12	18	24	30	36	42	48	54	60
7	14	21	28	35	42	49	56	63	70
8	16	24	32	40	48	56	64	72	80
9	18	27	36	45	54	63	72	81	90
10	20	30	40	50	60	70	80	90	100

1	2	3	4	5	6	7	8	9	10
2	4	6	8	10	12	14	16	18	20
3	6	9	12	15	18	21	24	27	30
4	8	12	16	20	24	28	32	36	40
5	10	15	20	25	30	35	40	45	50
6	12	18	24	30	36	42	48	54	60
7	14	21	28	35	42	49	56	63	70
8	16	24	32	40	48	56	64	72	80
9	18	27	36	45	54	63	72	81	90
10	20	30	40	50	60	70	80	90	100