Function

A series of instructions that are grouped and callable by a name. The primary components of a function are its:

• name
• parameter(s)
• return value

These three things together are called a function’s signature.

Below is an example Javascript function that adds two numbers:

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function addValues(a, b) {
    return a + b;
}

Here is an example Kotlin function that finds the smallest value in a list:

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fun smallestValue(value: List<Int>): Int {
    var smallest = value.first()
    value.forEach {
        if (it < smallest) {
            smallest = it
        }
    }
    return smallest
}

Go, the programming language created by Google, permits multiple return values.

Further Reading

• Jim's computer science topics: functions