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Original
2026-01-01
Modified
2026-03-09
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<p>Function example.</p>
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<p>Function example.</p>
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var calculateSum = function (numberFirst, numberSecond) { var sum = numberFirst + numberSecond; return sum; }; calculateSum(); // Will return NaN calculateSum(2); // Will return NaN calculateSum(2, 5); // Will return 7 calculateSum(9, 5); // Will return 14<p>In this example:</p>
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var calculateSum = function (numberFirst, numberSecond) { var sum = numberFirst + numberSecond; return sum; }; calculateSum(); // Will return NaN calculateSum(2); // Will return NaN calculateSum(2, 5); // Will return 7 calculateSum(9, 5); // Will return 14<p>In this example:</p>
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<ul><li>calculateSum is the name you can use to call the function.</li>
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<ul><li>calculateSum is the name you can use to call the function.</li>
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<li>numberFirst, numberSecond are function parameters.</li>
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<li>numberFirst, numberSecond are function parameters.</li>
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<li>return sum; is the place in the code where sum is returned and where we exit the function.</li>
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<li>return sum; is the place in the code where sum is returned and where we exit the function.</li>
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<li>calculateSum(2, 5); are arguments that are transferred in the function when it is called. The order of the arguments is the same as for the function parameters. The first argument 2 is written to the first parameter numberFirst, argument 5 is written to parameter numberSecond. It’s important to observe the parameter order when calling the function in order to avoid errors that are not obvious.</li>
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<li>calculateSum(2, 5); are arguments that are transferred in the function when it is called. The order of the arguments is the same as for the function parameters. The first argument 2 is written to the first parameter numberFirst, argument 5 is written to parameter numberSecond. It’s important to observe the parameter order when calling the function in order to avoid errors that are not obvious.</li>
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</ul><a>Continue</a>
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</ul><a>Continue</a>