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![Referring to a specific element:
Example:
quiz[0]
quiz[1]
quiz[2]
quiz[3]
Accessing Array](https://image.slidesharecdn.com/wpjs-lesson20-presentation-240319233906-e65d08dc/85/JAVASCRIPT-LESSON-20-LEARNJAVASCRIPT-ARRAYS-7-320.jpg)
![Assigning values to the elements:
Example:
grades[0] = 90;
grades[l] = 83;
grades[2] = 85;
grades[3] = 92;
Accessing Array](https://image.slidesharecdn.com/wpjs-lesson20-presentation-240319233906-e65d08dc/85/JAVASCRIPT-LESSON-20-LEARNJAVASCRIPT-ARRAYS-8-320.jpg)
![Code: sample21.html
<html>
<head><title> Using Arrays </title></head>
<body>
<script language="JavaScript">
nday = new Array(7);
nday[0] = prompt(“Enter the first day of the
week”,””);
nday[1] = prompt(“Enter the second day of the
week”,””);
nday[2] = prompt(“Enter the third day of the
week”,””);
nday[3] = prompt(“Enter the fourth day of the
week”,””);](https://image.slidesharecdn.com/wpjs-lesson20-presentation-240319233906-e65d08dc/85/JAVASCRIPT-LESSON-20-LEARNJAVASCRIPT-ARRAYS-9-320.jpg)
![nday[4] = prompt(“Enter the fith day of the
week”,””);
nday[5] = prompt(“Enter the sixth day of the
week”,””);
nday[6] = prompt(“Enter the seventh day of the
week”,””);
document.writeln(“The first day of the week is “ +
nday[0]);
document.writeln(“<br>”);
document.writeln(“The last day of the week is “ +
nday[6]);
</script>
</body>
</html>](https://image.slidesharecdn.com/wpjs-lesson20-presentation-240319233906-e65d08dc/85/JAVASCRIPT-LESSON-20-LEARNJAVASCRIPT-ARRAYS-10-320.jpg)
![Code: sample22.html
<html>
<head><title>Using Arrays</title></head>
<body>
<script language="JavaScript">
grade = new Array(4);
sum=0;
for(i=0; i<4; i++){
grade[i] = prompt("Enter the grade","");
sum+=parseInt(grade[i]);
}
average = sum/4;](https://image.slidesharecdn.com/wpjs-lesson20-presentation-240319233906-e65d08dc/85/JAVASCRIPT-LESSON-20-LEARNJAVASCRIPT-ARRAYS-13-320.jpg)
![document.writeln("List of grades: <br>");
for(i=0; i<4; i++){
document.writeln("Quarter " + (i+1) + ": ");
document.writeln(grade[i] + "<br>");
}
document.writeln("Average :" + average);
</script>
</body>
</html>](https://image.slidesharecdn.com/wpjs-lesson20-presentation-240319233906-e65d08dc/85/JAVASCRIPT-LESSON-20-LEARNJAVASCRIPT-ARRAYS-14-320.jpg)
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JAVASCRIPT LESSON 20 - LEARNJAVASCRIPT - ARRAYS
- 1.
- 2. In this Lesson Whatis an Array? In This Lesson Using for Statement in Arrays
- 3. What is anArray?
- 4. What is anArray? An array contains a set of data represented by a single variable name.
- 5. Formats in Creatingan Array • array_name = newArray(number of elements); Example: quiz = newArray(4);
- 6. Formats in Creatingan Array •array_name = newArray(elements); Example: grades = newArray(85, 83, 90, 89);
- 7. Referring to aspecific element: Example: quiz[0] quiz[1] quiz[2] quiz[3] Accessing Array
- 8. Assigning values tothe elements: Example: grades[0] = 90; grades[l] = 83; grades[2] = 85; grades[3] = 92; Accessing Array
- 9. Code: sample21.html <html> <head><title> UsingArrays </title></head> <body> <script language="JavaScript"> nday = new Array(7); nday[0] = prompt(“Enter the first day of the week”,””); nday[1] = prompt(“Enter the second day of the week”,””); nday[2] = prompt(“Enter the third day of the week”,””); nday[3] = prompt(“Enter the fourth day of the week”,””);
- 10. nday[4] = prompt(“Enterthe fith day of the week”,””); nday[5] = prompt(“Enter the sixth day of the week”,””); nday[6] = prompt(“Enter the seventh day of the week”,””); document.writeln(“The first day of the week is “ + nday[0]); document.writeln(“<br>”); document.writeln(“The last day of the week is “ + nday[6]); </script> </body> </html>
- 11.
- 12. Using for Statementin Arrays
- 13. Code: sample22.html <html> <head><title>Using Arrays</title></head> <body> <scriptlanguage="JavaScript"> grade = new Array(4); sum=0; for(i=0; i<4; i++){ grade[i] = prompt("Enter the grade",""); sum+=parseInt(grade[i]); } average = sum/4;
- 14. document.writeln("List of grades:<br>"); for(i=0; i<4; i++){ document.writeln("Quarter " + (i+1) + ": "); document.writeln(grade[i] + "<br>"); } document.writeln("Average :" + average); </script> </body> </html>
- 15.
- 16. Answer the activity onpage 102. Test Your Knowledge
- 17. Do the activityon page 103. Activity Time
- 18.
- 19.