Strings & Patterns Learning Mode
Qusetions Index 68/158
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
Because PHP dynamically converts variables to different types as needed, you must be careful when performing string comparisons.
What is the output of the following PHP script?
<?php
$str1 = '57 channels';
$str2 = '1/2 a pack of cigarettes';
$str3 = '0x10';
if ($str1 == 57) { echo 'a'; }
else { echo 'b'; }
if ($str2 == 0.5) { echo 'c'; }
else if ($str2 == 1) { echo 'd'; }
else { echo 'e'; }
if ($str3 == 0) { echo 'f'; }
else if ($str3 == 16) { echo 'g'; } // 0x10 is 16 in decimal
else if ($str3 == 0x10) { echo 'h'; }
?>