Question: Given strings str 1 = Hello and str 2 = Goodbye , what is the ending value of string str 3 ? s t

Given strings str1= "Hello" and str2= "Goodbye ", what is the ending value of string str3?
str3=str1+str2
Hello Goodbye
HelloGoodbye
Goodbye Hello
Error: Cannot add variables of type string
Given strings str1= "Hello" and str2= "Goodbye ", what is the

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