Description: Substitution is the process of replacing a variable or command with its corresponding value in a specific context. This concept is fundamental in various areas of programming and computing, as it allows for the dynamic manipulation of data and the execution of commands more efficiently. In programming languages, substitution is used to assign values to variables and for string interpolation, where variable values are inserted into text strings. In the context of scripting languages, substitution allows for executing commands and using their results in other commands, facilitating task automation. Additionally, in the realm of databases and SQL, substitution is applied in constructing dynamic queries, where parameters are replaced at runtime. This process not only improves code readability but also optimizes performance by avoiding the repetition of values and commands, making development more agile and less error-prone.
