Call By Value
Call by value is a parameter-passing mechanism in programming where the actual value of an argument is copied into the formal parameter of a function. This means that modifications to the parameter inside the function do not affect the original argument outside the function. It is a fundamental concept in many programming languages, such as C and Java, for primitive data types.
Developers should learn call by value to understand how data is passed in functions, which is crucial for writing predictable and bug-free code, especially when dealing with immutable data or avoiding unintended side effects. It is commonly used in languages like C for passing basic types (e.g., integers, floats) and in Java for primitives, ensuring that functions operate on local copies without altering the original variables.