c_meyer/pxt-calliope
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Rest of Basic in simple English. Reconsider some code samples?

Browse Source
This commit is contained in:
Ron Hale-Evans 2016-05-20 13:09:18 -07:00
parent 9c96591edd
commit 21361708ec
2 changed files with 19 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
docs/reference/basic/forever.md
View File

@ -1,6 +1,7 @@
# Forever # Forever
Repeat code [in the background](/reference/control/in-background) forever. Keep running part of a program
[in the background](/reference/control/in-background).
```sig ```sig
basic.forever(() => { basic.forever(() => {
@ -9,7 +10,9 @@ basic.forever(() => {
### Example: compass ### Example: compass
The following example constantly checks the [compass heading](/reference/input/compass-heading) and updates the screen with the direction. The following example constantly checks the
[compass heading](/reference/input/compass-heading)
and updates the screen with the direction.
```blocks ```blocks
basic.forever(() => { basic.forever(() => {
@ -30,7 +33,9 @@ basic.forever(() => {
### Example: counter ### Example: counter
The following example continually shows the current value of a global variable: The following example keeps showing the [number](/reference/types/number) stored in a global variable.
When you press button `A`, the number gets bigger.
You can use a program like this to count things with your BBC micro:bit.
```blocks ```blocks
let num = 0 let num = 0
@ -42,9 +47,12 @@ input.onButtonPressed(Button.A, () => {
}) })
``` ```
### Contention for the LED display ### Competing for the LED screen
If you have multiple processes that each show something on the LED screen, you may get unexpected results. Try, for example: If different parts of a program are each trying
to show something on the LED screen at the same time,
you may get unexpected results.
Try this on your micro:bit:
```blocks ```blocks
basic.forever(() => { basic.forever(() => {

9
docs/reference/basic/pause.md
View File

@ -1,6 +1,7 @@
# Pause # Pause
Pause program execution for the specified number of milliseconds. This function is helpful when you need to slow down your program's execution. Pause the program for the number of milliseconds you say.
You can use this function to slow your program down.
```sig ```sig
basic.pause(400) basic.pause(400)
@ -8,11 +9,13 @@ basic.pause(400)
### Parameters ### Parameters
* ``ms`` - the number of milliseconds that you want to pause (100 = 1/10 second, 1000 milliseconds = 1 second) * ``ms`` is the number of milliseconds that you want to pause (100 milliseconds = 1/10 second, and 1000 milliseconds = 1 second).
### Example: diagonal line ### Example: diagonal line
The following example code turns on LED `0, 0` thru `4, 4`, pausing 500 milliseconds after each LED. Without `pause`, the code would run so fast that you wouldn't see each individual LED turning on. This example draws a diagonal line by turning on LED `0, 0` (top left) through LED `4, 4` (bottom right).
The program pauses 500 milliseconds after turning on each LED.
Without `pause`, the program would run so fast that you would not have time to see each LED turning on.
```blocks ```blocks
for (let i = 0; i < 5; i++) { for (let i = 0; i < 5; i++) {