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Frequently Asked Questions

How to find the sum of an array of numbers in JavaScript?

You can use the reduce () method to find the sum of an array of numbers. The reduce () method executes the specified reducer function on each member of the array resulting in a single output value as in the following example: The 0 in is the default value. If default value is not supplied, the first element in the array will be used.

What is the foreach () method in JavaScript?

The forEach () method executes a provided function once for each array element. Function to execute on each element. It accepts between one and three arguments: The current element being processed in the array. The index of element in the array. The array forEach () was called upon. Value to use as this when executing callbackFn . undefined.

How many arguments does foreach () accept in JavaScript?

It accepts between one and three arguments: The current element being processed in the array. The index of element in the array. The array forEach () was called upon. Value to use as this when executing callbackFn.

What is array foreach in JavaScript?

Array.prototype.forEach () The forEach () method executes a provided function once for each array element.


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