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What is array.first in Swift?
Theodore Kelechukwu OnyejiakuOverview
The first property of an array in Swift returns the first element of the array.
Syntax
arr.first
Parameters
This does not take any parameters.
Return value
The value returned is the first element of the array.
Example
// create arrays var gnaam = ["Google", "Netflix", "Amazon", "Apple", "Facebook", "Meta"]; var letters = ["a", "b", "c", "d", "e"]; var numbers = [1, 2, 3]; // get first elements let first1 = gnaam.first ?? ""; var first2 = letters.first ?? ""; var first3 = numbers.first ?? 0; // print results print(first1); // Google print(first2); // a print(first3); // 1
Get first elements of arrays with "first" property
Explanation
- Lines 2–4: We create arrays
gnaam,letters, andnumbers. - Lines 7–9: We use the
firstarray instance property to get the first element of each array. We store the results in variablesfirst1,first2, andfirst3. The question marks in the code returns""for the first and second array and returns0for the third array if they are empty ornil. - Line 12–14: We print the results.
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