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How to get sequence number in loops with JavaScript?
To get sequence number in loops, use the forEach() loop. Following is the code −
Example
let studentDetails = [ { id: 101, details: [{name: 'John'}, {name: 'David'},{name: 'Bob'}]}, {id:102, details: [{name:'Carol'},{name:'David'}, {name:'Mike'}] } ]; var counter = 1; studentDetails.forEach(function(k){ k.details.forEach(function(f) { console.log(counter++); } ); });
To run the above program, you need to use the following command −
node fileName.js.
Output
Here, my file name is demo159.js. This will produce the following output −
PS C:\Users\Amit\JavaScript-code> node demo159.js 1 2 3 4 5 6
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