sbms.txt

smallbasic for linux

Mathematics:
____________________________

All angles are in RADs.

ABS(x) - Absolute value of x
COS(x) - Cosine of x
SIN(x) - Sine of x
TAN(x) - Tangent of x
ACOS(x) - Arc cosine of x
ASIN(x) - Arc sine of x
ATAN(x) - Arc tangent of x
ATAN2(x,y) - Arc tangent
  of two variables

Hyperbolic functions:

COSH(x), SINH(x), TANH(x)
ACOSH(x), ASINH(x), ATANH(x)

EXP(x) - the value of e
  raised to the power of x
LOG(x) - natural logarithm
  of x
LOG10(x) - the base-10
  logarithm of x

POW(x,y) - x raised to
  power of y
SQR(x) - square root of x

INT(x) - rounds x downwards
  to the nearest integer
FIX(x) - rounds x upwards
  to the nearest integer
ROUND(x [,decs])
  rounds the x to the
  nearest integer or
  fp with 'decs' decimal
  digits.

SGN(x) - sign of x
  +1 for positive,
  -1 for negative and
   0 for zero

DEG(x) - rads to degrees
RAD(x) - degrees to rads

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MAX(...), MIN(...)

Maximum/Minimum value of
parameters. Parameters can
be anything (arrays, ints,
reals, strings).

Example:
? MAX(3,4,8)
? MIN(array(),2,3)
? MAX("abc","def")
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Strings:
____________________________

LEN(s) - length of string
SPACE$(n) - returns a string
  of 'n' spaces

OCT$(x) - octal value string
  of x
HEX$(x) - hexadecimal value
  string of x
VAL(s) - numeric value of
  string s
STR$(x) - convert x to 
  string
ASC(s) - ASCII code of first
  character of s
CHR$(x) - returns one-char
  string of character with
  ASCII code x
____________________________

LCASE$(s), UCASE$(s)

Converts the string s to 
lower/upper case

Example:
? LCASE$("Hi"):REM hi
? UCASE$("Hi"):REM HI
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LTRIM$(s), RTRIM$(s)

Removes leading/trailing
spaces from string s

? LEN(LTRIM$("  Hi")):REM 2
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LEFT$(s,n), RIGHT$(s,n)

Returns the n number of
leftmost/rightmost chars
of string s
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MID$(s, start [,length])

Returns the part (length)
of the string s starting
from 'start' position

If the 'length' parameter is
omitted, MID$ returns the
whole string from the pos.
'start'.
____________________________

INSTR([start,] s1, s2)

Returns the position of the
first occurrence of the
string s2 into string s1
(starting from the position
'start')

If there is no match, INSTR
returns 0
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STRING$(len,{ascii|str})
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SPLIT string, delimiters,
  words()

Returns the words of the
specified string into 
array 'words'

Example:

s$="/etc/temp/filename.ext"

SPLIT s$, "/.", v()
FOR i=0 TO UBOUND(v)
  PRINT i;" [";v(i);"]"
NEXT

displays:
0 []
1 [etc]
2 [temp]
3 [filename]
4 [ext]