What is the difference between the keywords val and var in Kotlin? If you’re coming from Java, val refers to variable that cannot be updated after it has been assigned a value; while var is the usual writable variable whose value can always be changed by other codes.
“val” is like “final” in Java
Consider the following codes from Java and Kotlin.
Java codes
Line 14 causes compilation error as it is not allowed to change the value of a final variable after it has been initialized to some value.
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Kotlin Codes
Line 13 causes a compilation error as val variables’ values are unchangeable.
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“var” variables are modifiable
var are non-constant variables whose values can be changed anytime.
1 2 3 | // In Kotlin var name = "Turreta" var name = "www.turreta.com" |
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