![]() Once the function reaches 1, instead of calling itself it returns 1.To fix the error we need to add a condition that stops the function from calling itself as soon as it reaches the value of 1: function calcFactorial ($num) The error is the result of the function calling itself too many times because it has nothing that tells it to stop the execution.įrom this we can learn that when using recursion it is essential to limit the number of calls that a function can make. Something like the one that I got on my computer:įatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 262144 bytes) in index.php on line 3 But if you try running the following function you'll get an error: function calcFactorial ($num) Recursive function, in which a function calls itself, can perform the calculation. For example, that's how to calculate factorial 5: 4.8.4.4.# Find the factorial of a number using recursion?įactorial is the product of all the integers below or equal to a given number.4.8.4.4.3 A phrase or paragraph with an alternative graphical representation: charts, diagrams, graphs, maps, illustrations.4.8.4.4.2 A link or button containing nothing but the image.4.8.4.4 Requirements for providing text to act as an alternative for images.4.8.4.3.13 Reacting to environment changes.4.8.4.3.12 Normalizing the source densities.4.8.4.3.8 Creating a source set from attributes.4.8.4.3.6 Preparing an image for presentation.4.7.3 Attributes common to ins and del elements.4.6.6.1 The ` Ping-From` and ` Ping-To` headers.4.6.2 Links created by a and area elements.4.2.7 Interactions of styling and scripting.4.2.5.4 Specifying the document's character encoding.4.2.4.6 Providing users with a means to follow hyperlinks created using the link.4.2.4.3 Fetching and processing a resource.3.2.9 Requirements related to ARIA and to platform accessibility APIs. ![]() 3.2.8.2 User agent conformance criteria.3.2.8.1 Authoring conformance criteria for bidirectional-algorithm formatting characters.3.2.8 Requirements relating to the bidirectional algorithm.3.2.7 The innerText and outerText properties.3.2.6.6 Embedding custom non-visible data with the data-* attributes.3.1.4 Reporting document loading status.3.1.2 The DocumentOrShadowRoot interface.2.7.8 StructuredDeserializeWithTransfer ( serializeWithTransferResult,.2.7.7 StructuredSerializeWithTransfer ( value, transferList.2.7.6 StructuredDeserialize ( serialized, targetRealm [ ,.2.7.5 StructuredSerializeForStorage ( value ).2.7.3 StructuredSerializeInternal ( value, forStorage [ ,.2.6.3.3 The HTMLOptionsCollection interface.2.6.3.2 The HTMLFormControlsCollection interface. ![]()
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