xref: /PHP-8.4/ext/standard/tests/math/fpow.phpt (revision 23afe57f) 
1--TEST--
2fpow() function
3--FILE--
4<?php
5
6$numbers = [
7    0,
8    1,
9    -1,
10    1.0,
11    -1.0,
12    2,
13    -2,
14    2.1,
15    -2.1,
16    0.1,
17    -0.1,
18    0.0,
19    -0.0,
20    10,
21    -10,
22    INF,
23    -INF,
24    NAN,
25];
26
27foreach ($numbers as $base) {
28    foreach ($numbers as $exp) {
29        print str_pad($base, 4, " ", STR_PAD_LEFT) .
30            " ** " .
31            str_pad($exp, 4) .
32            " = " .
33            fpow($base, $exp) .
34            PHP_EOL;
35    }
36}
37?>
38--EXPECT--
39   0 ** 0    = 1
40   0 ** 1    = 0
41   0 ** -1   = INF
42   0 ** 1    = 0
43   0 ** -1   = INF
44   0 ** 2    = 0
45   0 ** -2   = INF
46   0 ** 2.1  = 0
47   0 ** -2.1 = INF
48   0 ** 0.1  = 0
49   0 ** -0.1 = INF
50   0 ** 0    = 1
51   0 ** -0   = 1
52   0 ** 10   = 0
53   0 ** -10  = INF
54   0 ** INF  = 0
55   0 ** -INF = INF
56   0 ** NAN  = NAN
57   1 ** 0    = 1
58   1 ** 1    = 1
59   1 ** -1   = 1
60   1 ** 1    = 1
61   1 ** -1   = 1
62   1 ** 2    = 1
63   1 ** -2   = 1
64   1 ** 2.1  = 1
65   1 ** -2.1 = 1
66   1 ** 0.1  = 1
67   1 ** -0.1 = 1
68   1 ** 0    = 1
69   1 ** -0   = 1
70   1 ** 10   = 1
71   1 ** -10  = 1
72   1 ** INF  = 1
73   1 ** -INF = 1
74   1 ** NAN  = 1
75  -1 ** 0    = 1
76  -1 ** 1    = -1
77  -1 ** -1   = -1
78  -1 ** 1    = -1
79  -1 ** -1   = -1
80  -1 ** 2    = 1
81  -1 ** -2   = 1
82  -1 ** 2.1  = NAN
83  -1 ** -2.1 = NAN
84  -1 ** 0.1  = NAN
85  -1 ** -0.1 = NAN
86  -1 ** 0    = 1
87  -1 ** -0   = 1
88  -1 ** 10   = 1
89  -1 ** -10  = 1
90  -1 ** INF  = 1
91  -1 ** -INF = 1
92  -1 ** NAN  = NAN
93   1 ** 0    = 1
94   1 ** 1    = 1
95   1 ** -1   = 1
96   1 ** 1    = 1
97   1 ** -1   = 1
98   1 ** 2    = 1
99   1 ** -2   = 1
100   1 ** 2.1  = 1
101   1 ** -2.1 = 1
102   1 ** 0.1  = 1
103   1 ** -0.1 = 1
104   1 ** 0    = 1
105   1 ** -0   = 1
106   1 ** 10   = 1
107   1 ** -10  = 1
108   1 ** INF  = 1
109   1 ** -INF = 1
110   1 ** NAN  = 1
111  -1 ** 0    = 1
112  -1 ** 1    = -1
113  -1 ** -1   = -1
114  -1 ** 1    = -1
115  -1 ** -1   = -1
116  -1 ** 2    = 1
117  -1 ** -2   = 1
118  -1 ** 2.1  = NAN
119  -1 ** -2.1 = NAN
120  -1 ** 0.1  = NAN
121  -1 ** -0.1 = NAN
122  -1 ** 0    = 1
123  -1 ** -0   = 1
124  -1 ** 10   = 1
125  -1 ** -10  = 1
126  -1 ** INF  = 1
127  -1 ** -INF = 1
128  -1 ** NAN  = NAN
129   2 ** 0    = 1
130   2 ** 1    = 2
131   2 ** -1   = 0.5
132   2 ** 1    = 2
133   2 ** -1   = 0.5
134   2 ** 2    = 4
135   2 ** -2   = 0.25
136   2 ** 2.1  = 4.2870938501452
137   2 ** -2.1 = 0.2332582478842
138   2 ** 0.1  = 1.0717734625363
139   2 ** -0.1 = 0.93303299153681
140   2 ** 0    = 1
141   2 ** -0   = 1
142   2 ** 10   = 1024
143   2 ** -10  = 0.0009765625
144   2 ** INF  = INF
145   2 ** -INF = 0
146   2 ** NAN  = NAN
147  -2 ** 0    = 1
148  -2 ** 1    = -2
149  -2 ** -1   = -0.5
150  -2 ** 1    = -2
151  -2 ** -1   = -0.5
152  -2 ** 2    = 4
153  -2 ** -2   = 0.25
154  -2 ** 2.1  = NAN
155  -2 ** -2.1 = NAN
156  -2 ** 0.1  = NAN
157  -2 ** -0.1 = NAN
158  -2 ** 0    = 1
159  -2 ** -0   = 1
160  -2 ** 10   = 1024
161  -2 ** -10  = 0.0009765625
162  -2 ** INF  = INF
163  -2 ** -INF = 0
164  -2 ** NAN  = NAN
165 2.1 ** 0    = 1
166 2.1 ** 1    = 2.1
167 2.1 ** -1   = 0.47619047619048
168 2.1 ** 1    = 2.1
169 2.1 ** -1   = 0.47619047619048
170 2.1 ** 2    = 4.41
171 2.1 ** -2   = 0.22675736961451
172 2.1 ** 2.1  = 4.7496380917422
173 2.1 ** -2.1 = 0.21054235726688
174 2.1 ** 0.1  = 1.0770154403044
175 2.1 ** -0.1 = 0.92849179554696
176 2.1 ** 0    = 1
177 2.1 ** -0   = 1
178 2.1 ** 10   = 1667.9880978201
179 2.1 ** -10  = 0.0005995246616609
180 2.1 ** INF  = INF
181 2.1 ** -INF = 0
182 2.1 ** NAN  = NAN
183-2.1 ** 0    = 1
184-2.1 ** 1    = -2.1
185-2.1 ** -1   = -0.47619047619048
186-2.1 ** 1    = -2.1
187-2.1 ** -1   = -0.47619047619048
188-2.1 ** 2    = 4.41
189-2.1 ** -2   = 0.22675736961451
190-2.1 ** 2.1  = NAN
191-2.1 ** -2.1 = NAN
192-2.1 ** 0.1  = NAN
193-2.1 ** -0.1 = NAN
194-2.1 ** 0    = 1
195-2.1 ** -0   = 1
196-2.1 ** 10   = 1667.9880978201
197-2.1 ** -10  = 0.0005995246616609
198-2.1 ** INF  = INF
199-2.1 ** -INF = 0
200-2.1 ** NAN  = NAN
201 0.1 ** 0    = 1
202 0.1 ** 1    = 0.1
203 0.1 ** -1   = 10
204 0.1 ** 1    = 0.1
205 0.1 ** -1   = 10
206 0.1 ** 2    = 0.01
207 0.1 ** -2   = 100
208 0.1 ** 2.1  = 0.0079432823472428
209 0.1 ** -2.1 = 125.89254117942
210 0.1 ** 0.1  = 0.79432823472428
211 0.1 ** -0.1 = 1.2589254117942
212 0.1 ** 0    = 1
213 0.1 ** -0   = 1
214 0.1 ** 10   = 1.0E-10
215 0.1 ** -10  = 10000000000
216 0.1 ** INF  = 0
217 0.1 ** -INF = INF
218 0.1 ** NAN  = NAN
219-0.1 ** 0    = 1
220-0.1 ** 1    = -0.1
221-0.1 ** -1   = -10
222-0.1 ** 1    = -0.1
223-0.1 ** -1   = -10
224-0.1 ** 2    = 0.01
225-0.1 ** -2   = 100
226-0.1 ** 2.1  = NAN
227-0.1 ** -2.1 = NAN
228-0.1 ** 0.1  = NAN
229-0.1 ** -0.1 = NAN
230-0.1 ** 0    = 1
231-0.1 ** -0   = 1
232-0.1 ** 10   = 1.0E-10
233-0.1 ** -10  = 10000000000
234-0.1 ** INF  = 0
235-0.1 ** -INF = INF
236-0.1 ** NAN  = NAN
237   0 ** 0    = 1
238   0 ** 1    = 0
239   0 ** -1   = INF
240   0 ** 1    = 0
241   0 ** -1   = INF
242   0 ** 2    = 0
243   0 ** -2   = INF
244   0 ** 2.1  = 0
245   0 ** -2.1 = INF
246   0 ** 0.1  = 0
247   0 ** -0.1 = INF
248   0 ** 0    = 1
249   0 ** -0   = 1
250   0 ** 10   = 0
251   0 ** -10  = INF
252   0 ** INF  = 0
253   0 ** -INF = INF
254   0 ** NAN  = NAN
255  -0 ** 0    = 1
256  -0 ** 1    = -0
257  -0 ** -1   = -INF
258  -0 ** 1    = -0
259  -0 ** -1   = -INF
260  -0 ** 2    = 0
261  -0 ** -2   = INF
262  -0 ** 2.1  = 0
263  -0 ** -2.1 = INF
264  -0 ** 0.1  = 0
265  -0 ** -0.1 = INF
266  -0 ** 0    = 1
267  -0 ** -0   = 1
268  -0 ** 10   = 0
269  -0 ** -10  = INF
270  -0 ** INF  = 0
271  -0 ** -INF = INF
272  -0 ** NAN  = NAN
273  10 ** 0    = 1
274  10 ** 1    = 10
275  10 ** -1   = 0.1
276  10 ** 1    = 10
277  10 ** -1   = 0.1
278  10 ** 2    = 100
279  10 ** -2   = 0.01
280  10 ** 2.1  = 125.89254117942
281  10 ** -2.1 = 0.0079432823472428
282  10 ** 0.1  = 1.2589254117942
283  10 ** -0.1 = 0.79432823472428
284  10 ** 0    = 1
285  10 ** -0   = 1
286  10 ** 10   = 10000000000
287  10 ** -10  = 1.0E-10
288  10 ** INF  = INF
289  10 ** -INF = 0
290  10 ** NAN  = NAN
291 -10 ** 0    = 1
292 -10 ** 1    = -10
293 -10 ** -1   = -0.1
294 -10 ** 1    = -10
295 -10 ** -1   = -0.1
296 -10 ** 2    = 100
297 -10 ** -2   = 0.01
298 -10 ** 2.1  = NAN
299 -10 ** -2.1 = NAN
300 -10 ** 0.1  = NAN
301 -10 ** -0.1 = NAN
302 -10 ** 0    = 1
303 -10 ** -0   = 1
304 -10 ** 10   = 10000000000
305 -10 ** -10  = 1.0E-10
306 -10 ** INF  = INF
307 -10 ** -INF = 0
308 -10 ** NAN  = NAN
309 INF ** 0    = 1
310 INF ** 1    = INF
311 INF ** -1   = 0
312 INF ** 1    = INF
313 INF ** -1   = 0
314 INF ** 2    = INF
315 INF ** -2   = 0
316 INF ** 2.1  = INF
317 INF ** -2.1 = 0
318 INF ** 0.1  = INF
319 INF ** -0.1 = 0
320 INF ** 0    = 1
321 INF ** -0   = 1
322 INF ** 10   = INF
323 INF ** -10  = 0
324 INF ** INF  = INF
325 INF ** -INF = 0
326 INF ** NAN  = NAN
327-INF ** 0    = 1
328-INF ** 1    = -INF
329-INF ** -1   = -0
330-INF ** 1    = -INF
331-INF ** -1   = -0
332-INF ** 2    = INF
333-INF ** -2   = 0
334-INF ** 2.1  = INF
335-INF ** -2.1 = 0
336-INF ** 0.1  = INF
337-INF ** -0.1 = 0
338-INF ** 0    = 1
339-INF ** -0   = 1
340-INF ** 10   = INF
341-INF ** -10  = 0
342-INF ** INF  = INF
343-INF ** -INF = 0
344-INF ** NAN  = NAN
345 NAN ** 0    = 1
346 NAN ** 1    = NAN
347 NAN ** -1   = NAN
348 NAN ** 1    = NAN
349 NAN ** -1   = NAN
350 NAN ** 2    = NAN
351 NAN ** -2   = NAN
352 NAN ** 2.1  = NAN
353 NAN ** -2.1 = NAN
354 NAN ** 0.1  = NAN
355 NAN ** -0.1 = NAN
356 NAN ** 0    = 1
357 NAN ** -0   = 1
358 NAN ** 10   = NAN
359 NAN ** -10  = NAN
360 NAN ** INF  = NAN
361 NAN ** -INF = NAN
362 NAN ** NAN  = NAN
363