It can contain letters and numbers but must start with a letter. It must contain at least one letter (at the start of the name). It must not contain special characters such as !@£$%&* or punctuation ...
int r; // this is a variable and it can be assigned a new value later in the program const float pi = 3.14; //this is a constant and wont change throughout the program ...
It can contain letters and numbers but must start with a letter. It must contain at least one letter (at the start of the name). It must not contain special characters such as !@£$%&* or punctuation ...
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