JavaScript supports several loop statements, including:
for
loop: Afor
loop is used to execute a block of code a specific number of times. It’s commonly used for iterating over arrays or for counting iterations.for-in
loop: Thefor-in
loop is used to iterate over the properties of an object. It is used to enumerate the properties of an object and it’s used to access the value of each property.for-of
loop: Thefor-of
loop is used to iterate over the values of an iterable object, such as an array, a string, or a Map. It’s similar to thefor-in
loop, but it’s used only for arrays and other iterable objects.while
loop: Awhile
loop is used to execute a block of code repeatedly as long as a certain condition is true. It’s commonly used for infinite loops or for loops that require a specific condition to be met.do-while
loop: Ado-while
loop is similar to awhile
loop, but the block of code is executed at least once before the condition is checked. This is useful when you want to ensure that the code inside the loop is executed at least once.
All of these loops are useful in different contexts and serve different purposes, it’s important to understand their differences and when to use them to write efficient and readable code.