All lines are working except the last one, saying no operator "+" matches the operands
12911
How to concatenate a std::string and an int
38967
What is the precedence of the + (plus) operator in Java?
47205
Why does "++x || ++y && ++z" calculate "++x" first, even though operator "&&" has higher precedence than "||"
130505
some \newcommand instructions not working
110007
What is the difference between operator "=" and "==" in Bash?
51624
Isn't there any other way of doing double quotes in LaTeX besides `` +  ''?
75129
Use & (ampersand) in single line bash loop
126174
What is the difference between != and  operators?
93418
+= operator appears to modify frozen string
141442
Why does my string comparison fail?
12813
Integer summing blues, short += short problem
11971
How can I define a math operator behaving like \lim or \sum with limits?
19121
How does the String class override the + operator?
78247
is it even possible to add a 0 in java with terny operators?
11928
Why isn't "k" incremented in the statement "m = ++i && ++j || ++k" when "++i&&++j" evaluates to true?
60205
Sum in Mathematica gives extra "+List"
135810
Why doesn't Ruby support i++ or i--​ (increment/decrement operators)?