Can I pass a variable number of arguments into a Javascript function? I have little knowledge in JS. I want to implement something like the following:
function CalculateAB3(data, val1, val2, ...)
{
...
}
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yes you can :-) heres a good tutorial w3schools.com/js/js_functions.aspStaleMartyr– StaleMartyr2013-10-28 07:18:32 +00:00Commented Oct 28, 2013 at 7:18
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3You can pass multiple arguments, but the better way is that you can pass an object or an array insteadAmGates– AmGates2013-10-28 07:19:17 +00:00Commented Oct 28, 2013 at 7:19
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yes...you can pass any number of parameters...javascript.info/tutorial/argumentsshemy– shemy2013-10-28 07:19:27 +00:00Commented Oct 28, 2013 at 7:19
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Javascript supports passing of multiple parameters through function.Jenz– Jenz2013-10-28 07:20:07 +00:00Commented Oct 28, 2013 at 7:20
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possible duplicate of JavaScript variable number of arguments to functionAlexis King– Alexis King2015-01-21 06:00:01 +00:00Commented Jan 21, 2015 at 6:00
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3 Answers
You can pass multiple parameters in your function and access them via arguments variable. Here is an example of function which returns the sum of all parameters you passed in it
var sum = function () {
var res = 0;
for (var i = 0; i < arguments.length; i++) {
res += parseInt(arguments[i]);
}
return res;
}
You can call it as follows:
sum(1, 2, 3); // returns 6
Comments
Simple answer to your question, surely you can
But personally I would like to pass a object rather than n numbers of parameters
Example:
function CalculateAB3(obj)
{
var var1= obj.var1 || 0; //if obj.var1 is null, 0 will be set to var1
//rest of parameters
}
Here || is logical operator for more info visit http://codepb.com/null-coalescing-operator-in-javascript/
A Is there a "null coalescing" operator in JavaScript? is a good read
Comments
Yes, you can make it. Use variable arguments like there:
function test() {
for(var i=0; i<arguments.length; i++) {
console.log(arguments[i])
}
}
