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JavaScript Loops

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Loop

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JavaScript Web Dev

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Date created

Mar 1, 2020

Cards (7)

Section 1

(7 cards)

Loop

Front

Execute the same block of code a specified number of times or while a specified condition is true.

Back

while loop

Front

A statement that creates a loop while a specified condition is true. The loop will continue to run as long as the condition is true. It will only stop when the condition becomes false. code example var start = 0; // when to start while (start < 10) { // when to stop console.log(start); start = start + 2; // how to get to the next item }

Back

nested loops

Front

a loop that is contained within another loop code example for (var x = 0; x < 5; x = x + 1) { for (var y = 0; y < 3; y = y + 1) { console.log(x + "," + y); } }

Back

increment

Front

To increase, usually by 1; the opposite of decrement code example x++ or ++x // same as x = x + 1 x += 3 // same as x = x + 3

Back

for loop

Front

Loops that have a explicitly defined beginning, end, and increment (step interval). syntax for ( start; stop; step ) { // do this thing } code example for (var i = 0; i < 6; i = i + 1) { console.log("Printing out i = " + i); }

Back

decrement

Front

To decrease, usually by 1; the opposite of increment. code example x-- or --x // same as x = x - 1 x -= 6 // same as x = x - 6

Back

3 parts of a while loop

Front

When to start: The code that sets up the loop — defining the starting value of a variable for instance When to stop: The logical condition to test whether the loop should continue. How to get to the next item: The incrementing or decrementing step — for example, x = x * 3 or x = x - 1

Back