- Tags: Conditional, JS Loop, JS Statement, Loop
- Categories: JavaScript Reference, JavaScript Statements, Reference
Quick Reference
The while statement defines a code block to be executed for as long as a condition is true.
The following loop will run until i = 5, outputting the numbers represented by i to the page.
// variable
let text = '';
let i = 0;
// loop
while (i < 5) {
text += i + '
';
i++;
}
// output to HTML element
document.getElementById('my_output').innerHTML = text;
Output
0
1
2
3
4
Syntax
while (condition) {
code to be executed
}
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JAVASCRIPT NOTES:
- When using JavaScript, single or double quotation marks are acceptable and work identically to one another; choose whichever you prefer, and stay consistent
- JavaScript is a case-sensitive language; firstName is NOT the same as firstname
- Arrays count starting from zero NOT one; so item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on
- JavaScript variables must begin with a letter, $, or _
- JavaScript variables are case sensitive (x is not the same as X)
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