Functions in Javscript

var functionName = function(variable)
{
    // code code code
    // code code code
    // (more lines of code)
};

// calling the function
functionName(variable);

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EXAMPLE #1
var foodDemand = function (food)
{
	console.log("I want to eat" + " "  + food + ".");
};

foodDemand("carrots");

OUTPUT:
I want to eat carrots.