declare an integer in C++

int n = 10;

This code declares an integer type variable called n and assigns it the value of 10. The keyword “int” tells the compiler that this variable is of type integer, meaning that its value can only be a whole number (no fractions or decimals). The lower-case letter “n” is the name of the variable, and it can be changed to anything else. The equals sign assigns the value of 10 to the variable. The semicolon at the end of the code line is a statement separator, letting the compiler know that this line is complete.