1.4 KiB
Sequencing
By calling one function after another, in sequence, you can create an animation:
basic.showLeds(`
. # . # .
. . . . .
. . # . .
# . . . #
. # # # .
`);
basic.showLeds(`
. # . # .
. . . . .
. . . . .
. # # # .
# . . . #
`);
The semicolon
In JavaScript, the semicolon (;) is used to terminate (or end) a statement. However, in most cases, the semicolon is optional and can be omitted. So both code sequences below are legal:
basic.showNumber(1)
basic.showNumber(2)
basic.showNumber(1);
basic.showNumber(2);
The empty statement
In JavaScript, there is the concept of an empty statement, which is whitespace followed by
a semicolon in the context where a statement is expected.
So, the following code is an infinite loop
followed by a call to showNumber that will never execute:
while(true) ;
basic.showNumber(1);
~hint
For the micro:bit, we don't allow a program to contain an empty statement, such as shown above. If you really want an empty statement, you need to use curly braces to delimit an empty statement block:
while(true) { }
basic.showNumber(1);
~
Read more about semicolons in JavaScript.
~button /js/variables
NEXT: Variable Declarations