Exam LX0-104 topic 1 question 10 discussion

A. function sumitup { echo $(($1 + $2)) ; } The function sumitup is a user-defined function in the Bash shell. It takes two arguments, represented by the variables $1 and $2. These arguments can be passed to the function when it is called. The function performs a calculation that adds the two arguments together and the result is stored in the $(($1 + $2)) expression. The echo command then outputs the result of this expression. The keyword function is used to define a function, followed by the function name sumitup. The commands that the function will perform are enclosed in curly braces {} and separated by semicolons ;. In this example, the function only has one command, which is echo $(($1 + $2)). This function can be called by simply typing sumitup followed by the two numbers that should be added. For example, sumitup 4 5 will output 9.