HEX$

Syntax: hex$(decimal)
Type: function

returns the hexidecimal value of a decimal number from integer form to a string. Hexidecimal values contain 0-9, and A-F.

e.g.


print hex$(54321)



will return "D431".

See also bin$, oct$.

HIBYTE -  intrinsic macros


HIWORD

 

IF...THEN

Type: statement

IF...THEN is a mechanism to only execute code if a condition is true, and can provide alternative code to execute based on more conditions. Basicly it is a way to make decisions.
END IF to end the single line IF's to make porting of complex C macros easier to be done (v1c)

the structure is like so:


if condition then
...
[elseif condition then
...]
[else
...]
end if



e.g. here is a simple "guess the number" game using if...then for a decision.


randomize timer
x = rnd * 10

print "guess the number between 0 and 10"

do
input "guess? "; y
if x = y then
print "right!"
exit do
elseif x > y then
print "too low"
elseif x < y then
print "too high"
end if
loop



See also #if, select case.

IMP

Syntax: a imp b
Type: operator
Category: logic

A bitwise operator which is the same as (not a) or b.

See also Logical operators.

INKEY$

Syntax: inkey$
Type: function
Category: Input

Returns the last key pushed on the keyboard.

e.g.


print "press q to quit"
do
loop until inkey$ = "q"



See also input, input$, line input.

Differences:
Between QB:
with extended codes, first char will be 255, not 0.

INP

Syntax: inp &h3c9
Type: function
Category: Gfx

Function for VGA port input emulation.

This function emulates the QB INP function for VGA port access; the only port value this function accepts is &h3C9. You do not normally need this function; use 8bit or higher color depth modes and PALETTE instead.

See also PALETTE, OUT, WAIT, screen (graphics).

Differences:
Between QB:
This command is only supported to emulate palette reading using the gfxlib library. The only port that can be used is &h3c9 (palette port). This is only included to support qb45 programs that use inp for palette manipulation.

Because of this, any other port will return 0.

Reason: User mode apps can't access IO ports directly.

INPUT

Type: statement
Category: Input

INPUT #

Type: statement
Category: File
INPUT # reads data items from a sequential device or file and assigns them
to variables.

INPUT #filenumber%, variablelist
_ The data items in the file should appear just as they would if you
were entering data in response to an INPUT statement. Separate
numbers with a space, carriage return, line feed, or comma. Separate
strings with a carriage return or line feed (leading spaces are
ignored). The end-of-file character will end either a numeric or
string entry.

input (file mode)

Type: keyword
Category: file mode

A file mode used with open to read lines of text from the file.

See also output.

INPUT$

Type: function
Category: Input

INSTR

Syntax: instr ([start,] subject, search)
Type: function

Returns the position in the string 'subject' for the first occurence of the string 'search'. Instr optionally only starts searching past the position 'start'.

If nothing is found it returns 0.

e.g.


print instr("abcdefg", "def")


Will return "4".

See also mid$ (function).

INT

Syntax: int(decimal number)
Type: function

If the input is an integer it returns the integer, otherwise returns the next integer less than the input. e.g. int(4.9) will return 4, and int(-1.3) will return -2.

integer

Type: data type

32-bit signed whole-number data type.

See also uinteger, data types.

Differences:
Between QB:
Now is 32-bit rather than 16-bit due to the 32-bit processors of today.

IS

Type: keyword
Category: control flow

See select case.