On start support (#324)

* annotating APIs to support onstart

* missed file

* updated templates

* adding new lines in main.ts

* fixing docs

* removing onstart

* updated docs

* updated various docs

* more docs

* adding upgrade policies for blocks

* updated pxt reference

* placing on start under "basic"
This commit is contained in:
Peli de Halleux
2016-12-19 14:09:35 -08:00
committed by GitHub
parent de9f2d7e67
commit 92b60a251d
17 changed files with 189 additions and 239 deletions

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@ -4,14 +4,21 @@
Run part of the program the number of times you say.
```block
for(let i = 0; i <= 4; ++i) {
}
```
### Example: Count to 4
This program will show the numbers 0, 1, 2, 3, and 4 one after another on the LED screen.
```blocks
for(let i = 0; i < 5; ++i) {
basic.showNumber(i)
}
input.onButtonPressed(Button.A, () => {
for(let i = 0; i < 5; ++i) {
basic.showNumber(i)
}
})
```
### See also

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@ -2,7 +2,7 @@
Repeat code while a [Boolean](/blocks/logic/boolean) `condition` is true.
```blocks
```block
while(true) {
}
```
@ -16,11 +16,13 @@ The condition is tested before any code runs. Which means that if the condition
The following example uses a while loop to make a diagonal line on the LED screen (points `0, 0`, `1, 1`, `2, 2`, `3, 3`, `4, 4`).
```blocks
let index = 4;
while(index >= 0) {
led.plot(index, index);
index--;
}
input.onButtonPressed(Button.A, () => {
let index = 4;
while(index >= 0) {
led.plot(index, index);
index--;
}
})
```
### See also