There is a general requirement when developing in javascript that is to loop through an array. This article will discuss how to iterate through an array in javascript using six different methods and example illustrations.
Table of Contents:-
- Loop through array in javascript using for loop
- Loop through array in javascript using for each loop
- Loop through array in javascript using for of
- Loop through array in javascript using for in
- Loop through array in javascript using while loop
- Loop through array in javascript using do while loop
Loop through array in javascript using for loop
Example:-
Print each element of the array [‘Java’, ‘is’, ‘a’, ‘popular’, ‘language’]
Function:-
let stringArray = ['Java', 'is', 'a', 'popular', 'language'];
for (let i = 0; i < stringArray.length; i++) {
console.log(stringArray[i]);
}
Output:-
Java is a popular language
Loop through array in javascript using for each loop
Example:-
Print each element of the array [‘Java’, ‘is’, ‘a’, ‘popular’, ‘language’]
Function:-
let stringArray = ['Java', 'is', 'a', 'popular', 'language'];
stringArray.forEach((eachElement) => {
console.log(eachElement);
});
Output:-
Java is a popular language
Loop through array in javascript using for of
Example:-
Print each element of the array [‘Java’, ‘is’, ‘a’, ‘popular’, ‘language’]
Function:-
let stringArray = ['Java', 'is', 'a', 'popular', 'language'];
for (let forElement of stringArray) {
console.log(forElement);
}
Output:-
Java is a popular language
Loop through array in javascript using for in
Example:-
Print each element of the array [‘Java’, ‘is’, ‘a’, ‘popular’, ‘language’]
Function:-
let stringArray = ['Java', 'is', 'a', 'popular', 'language'];
for(let key in stringArray){
console.log(stringArray[key]);
}
Output:-
Java is a popular language
Loop through array in javascript using while loop
Example:-
Print each element of the array [‘Java’, ‘is’, ‘a’, ‘popular’, ‘language’]
Function:-
let stringArray = ['Java', 'is', 'a', 'popular', 'language'];
let length = stringArray.length;
while(length > 0){
console.log(stringArray[stringArray.length - length]);
length--;
}
Output:-
Java is a popular language
Loop through array in javascript using do while loop
Example:-
Print each element of the array [‘Java’, ‘is’, ‘a’, ‘popular’, ‘language’]
Function:-
let stringArray = ['Java', 'is', 'a', 'popular', 'language'];
let length = stringArray.length;
do {
console.log(stringArray[stringArray.length - length]);
length--;
}
while (length > 0)
Output:-
Java is a popular language
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We hope this article helped you to iterate through an array in javascript. Good Luck !!!