CODEWITHSUNDEEP
json
SpamBug
SpamBug

Reputation: 21

Json error of undefine when using for loop

im learning JSON and encounter a problem when looping JSON. This is my JSON response

{
"success": 1,
"category": [{
    "id": "1",
    "category": "Editorial",
    "created_at": "2019-11-05 18:10:31",
    "firstname": "abc",
    "lastname": "xyz"
}, {
    "id": "2",
    "category": "Sports",
    "created_at": "2019-11-05 19:25:50",
    "firstname": "abc",
    "lastname": "xyz"
}, {
    "id": "3",
    "category": "Health",
    "created_at": "2019-11-05 19:27:23",
    "firstname": "abc",
    "lastname": "xyz"
}, {
    "id": "4",
    "category": "Food",
    "created_at": "2019-11-05 19:39:17",
    "firstname": "abc",
    "lastname": "xyz"
}]}

and this is my loop

for(var i = 0; i <= jsonData.category.length; i++){
      console.log(jsonData.category[i]['firstname']);}

it does print in console but it gives me this error

Cannot read property 'firstname' of undefined at Object.success

Upvotes: 1

Views: 19

Answers (1)

Daphoque
Daphoque

Reputation: 4678

Use < instead of <=. Otherwise you reach an undefined index.

for(var i = 0; i < jsonData.category.length; i++){
  console.log(jsonData.category[i]['firstname']);
}

Upvotes: 1

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