JavaScript – How to loop an Array
In JavaScript, we can use for
, forEach
or for..of
to loop an Array.
1.1 for
//old-school, classic for loop
var str = ["a", "b", "c", "d", "e"];
for(var i =0; i < str.length; i++){
console.log(str[i]); //a,b,c,d,e
}
output
a
b
c
d
e
1.2 forEach()
var num = [1, 2, 3, 4, 5];
num.forEach(anyFunction)
function anyFunction(data){
console.log(data);
}
output
1
2
3
4
5
1.3 for..of
var strArray = ["a", "b", "c", "d", "e"];
for(var s of strArray){
console.log(s);
}
output
a
b
c
d
e
References
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