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How to get the size of a variable in memory in Swift
Theodore Kelechukwu OnyejiakuOverview
Whenever we create a variable, it uses memory. The size of the variable is dependent on the type of data. And of course, we have different data types in Swift:
IntFloatDoubleBoolStringCharacter
We can get the size of a variable using the MemoryLayout.size(ofValue:) method.
Syntax
MemoryLayout.size(ofValue: variable)
Get the size of a variable in Swift
Parameters
variable: This is the variable and we must determine its size.
Return value
The value returned is an integer value representing the size of a variable in memory.
Example
import Swift // create some variables var var1:Bool = false; var var2:String = "Hello"; var var3:Character = "A"; var var4:Int = 10; var var5:Float = 15.5; // print the sizes of the variables print(MemoryLayout.size(ofValue: var1)); print(MemoryLayout.size(ofValue: var2)); print(MemoryLayout.size(ofValue: var3)); print(MemoryLayout.size(ofValue: var4)); print(MemoryLayout.size(ofValue: var5));
Get the size of a variable in memory in Swift
Explanation
In the code above:
- Lines 4–8: We create different variables and initialize them.
- Lines 11–15: We print the size of each variable using the
MemoryLayout.size(ofValue:)method.
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Theodore Kelechukwu OnyejiakuRELATED COURSES
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