// Swift program to append a string using// addition assignment operator (+=) operatorvar str="Hello "str+="World"print(str) Output: Hello World ...Program finished with exit code 0 Press ENTER to exit console. Explanation: In the above program, we imported a packageSwiftto use theprint...
S(2)=3\\ S(3)=4 {/eq} Successor functions is also a primitive recursive function. Answer and Explanation: We first give the base case for the recursion: {eq}a\cdot 0 = 0 {/eq} Then we define the successor function for multiplic...