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
|
Usage
The return statement is used to immediately return from a
function, or to return from a keyboard session. The syntax
for its use is
return
Inside a function, a return statement causes FreeMat to exit
the function immediately. When a keyboard session is active,
the return statement causes execution to resume where the
keyboard session started.
Example
In the first example, we define a function that uses a
return to exit the function if a certain test condition is
satisfied.
return_func.m
function ret = return_func(a,b)
ret = 'a is greater';
if (a > b)
return;
end
ret = 'b is greater';
printf('finishing up...\n');
Next we exercise the function with a few simple test cases:
--> return_func(1,3)
finishing up...
ans =
b is greater
--> return_func(5,2)
ans =
a is greater
In the second example, we take the function and rewrite it
to use a keyboard statement inside the if statement.
return_func2.m
function ret = return_func2(a,b)
if (a > b)
ret = 'a is greater';
keyboard;
else
ret = 'b is greater';
end
printf('finishing up...\n');
Now, we call the function with a larger first argument,
which triggers the keyboard session. After verifying a few
values inside the keyboard session, we issue a return
statement to resume execution.
--> return_func2(2,4)
finishing up...
ans =
b is greater
--> return_func2(5,1)
[return_func2,4]--> ret
ans =
a is greater
[return_func2,4]--> a
ans =
5
[return_func2,4]--> b
ans =
1
[return_func2,4]--> return
finishing up...
ans =
a is greater
* FreeMat_Documentation
* Flow_Control
* Generated on Thu Jul 25 2013 17:17:14 for FreeMat by
doxygen_ 1.8.1.1
|
