set of inputs and a set of permissible outputs.
[1]
[2]
y
= f(x)Function is a named part of a code that performs a distinct service.
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Module 2: Functions in JavaScript D. Petin 05/2014
Содержание
- 1. Module 2: Functions in JavaScript D. Petin 05/2014
- 2. AgendaFunctions in JS Input and OutputJS Code ProcessingDeclaration and Expression[1][2][3][4]
- 3. Functions in JS
- 4. Basic InformationIn mathematics:In classical programming[3]Function is a
- 5. Examplevar i, base, power, result;base = 2;
- 6. Declaration of functionfunction is a special keyword
- 7. Examplevar i, base, power, result;base = 2;
- 8. Examplefunction pow () { result =
- 9. Function callCall - operation for execution of
- 10. Examplevar i, base, power, result;base = 2;
- 11. Input and Output
- 12. Input and Outputfunction name (a, b) {
- 13. Examplefunction pow () { result =
- 14. Examplefunction pow (base, power) { var
- 15. Examplevar i, out;out = pow(2, 2);console.log(out);out =
- 16. JS Code Processing
- 17. Code processingvar a = 10;test();function test ()
- 18. Code processingvar a = 10;test();function test ()
- 19. Code processingvar a = 10;test();function test ()
- 20. Code processingvar a = 10;test();function test ()
- 21. Code processingvar a = 10;test();function test ()
- 22. Declaration and Expression
- 23. Declaration and Expressionfunction name () {
- 24. Additional Facts About FunctionsFunctions in JavaScript are
- 25. Слайд 25
- 26. Скачать презентанцию
AgendaFunctions in JS Input and OutputJS Code ProcessingDeclaration and Expression[1][2][3][4]
Слайды и текст этой презентации
Слайд 2Agenda
Functions in JS
Input and Output
JS Code Processing
Declaration and Expression
[1]
[2]
[3]
[4]
![AgendaFunctions in JS Input and OutputJS Code ProcessingDeclaration and Expression[1][2][3][4]](/img/thumbs/b91f62b7525cd7397370a62f14d46dd7-800x.jpg "Module 2: Functions in JavaScript
D. Petin
05/2014 AgendaFunctions in JS Input and OutputJS Code ProcessingDeclaration and Expression[1][2][3][4]")
Слайд 4Basic Information
In mathematics:
In classical programming
[3]
Function is a relation between a
set of inputs and a set of permissible outputs.
= f(x)![Basic InformationIn mathematics:In classical programming[3]Function is a relation between a set of inputs and a set of](/img/thumbs/c159c138dcb4224633b07a0271b04e65-800x.jpg "Module 2: Functions in JavaScript
D. Petin
05/2014 Basic InformationIn mathematics:In classical programming[3]Function is a relation between a set")
Слайд 5Example
var i, base, power, result;
base = 2; power = 2;
result = 1;
for(i = 0; i < power; i++)
{result *= base;
}
console.log(result);
base = 3; power = 4; result = 1;
for(i = 0; i < power; i++) {
result *= base;
}
console.log(result);
[1]
[2]
[3]
[4]
[5]
Слайд 6Declaration of function
function is a special keyword for creation of
function in JavaScript.
function name () {
body;
}
[1]
[2]
Слайд 7Example
var i, base, power, result;
base = 2; power = 2;
result = 1;
for(i = 0; i < power; i++)
{result *= base;
}
console.log(result);
base = 3; power = 4; result = 1;
for(i = 0; i < power; i++) {
result *= base;
}
console.log(result);
Слайд 9Function call
Call - operation for execution of function.
( )
– operator for this action.
Usually function can be called
by name. [1]
[2]
[3]
Слайд 10Example
var i, base, power, result;
base = 2; power = 2;
pow();
console.log(result);
base = 3; power = 4;
pow();
console.log(result);
function pow () {
result = 1; for(i = 0; i < power; i++) {
result *= base;
}
}
Слайд 12Input and Output
function name (a, b) {
return a
+ b;
}
[1]
* you can return one value only
* return
always interrupts the execution. * place your return at the end of a function
[2]
[3]
[3]
![Input and Outputfunction name (a, b) { return a + b;} [1]* you can return one](/img/tmb/4/327164/1bf214ef85b8358792ce133b48dad8d4-800x.jpg "Module 2: Functions in JavaScript
D. Petin
05/2014 Input and Outputfunction name (a, b) { return a + b;}")
Слайд 14Example
function pow (base, power) {
var result = 1;
for (i = 0, I < power; i++) {
result *= base;}
return result;
}
Слайд 15Example
var i, out;
out = pow(2, 2);
console.log(out);
out = pow(3, 4);
console.log(out);
function pow
(base, power) {
var result = 1;
for(i = 0; i < power; i++) {result *= base;
}
return result;
}
Слайд 17Code processing
var a = 10;
test();
function test () {
a
= 30;
var b = 40;
}
var b = 20;
console.log(a,
b);
Слайд 18Code processing
var a = 10;
test();
function test () {
a
= 30;
var b = 40;
}
var b = 20;
console.log(a,
b);1.
Слайд 19Code processing
var a = 10;
test();
function test () {
a
= 30;
var b = 40;
}
var b = 20;
console.log(a,
b);1.
2.
3.
Слайд 20Code processing
var a = 10;
test();
function test () {
a
= 30;
var b = 40;
}
var b = 20;
console.log(a,
b);1.
2.
3.
4.
5.
6.
Слайд 21Code processing
var a = 10;
test();
function test () {
a
= 30;
var b = 40;
}
var b = 20;
console.log(a,
b);1.
2.
3.
4.
5.
6.
5.1
5.2
![Declaration and Expressionfunction name () { body;} [1]var name = function () { body;};](/img/thumbs/0cac446aa3a0f61b9785ee6c45f402a0-800x.jpg "Module 2: Functions in JavaScript
D. Petin
05/2014 Declaration and Expressionfunction name () { body;} [1]var name = function () { body;}; [2]")
Слайд 24Additional Facts About Functions
Functions in JavaScript are Objects.
As a result,
functions are accessible by reference.
Functions can be used as a
parameter in other function.References to functions can be saved in any other variable.
[1]
[2]
[3]
[4]
