Why variable name does not start with numbers in C ?

Posted by ginni arora on June 13th, 2019

    Lexical Analysis Syntax Analysis Semantic Analysis Intermediate Code Generation Code Optimization Code Generation Symbol Table

Backtracking is maintained a strategic distance from in lexical investigation stage while assembling the bit of code. The variable like Apple; the compiler will realize its an identifier immediately when it meets the letter 'A' character in the lexical Analysis stage. In any case, a like 123apple, the compiler won't most likely choose if its a number or identifier until it hits 'an' and it needs backtracking to go in the lexical investigation stage to recognize that it is a variable. In any case, it isn't upheld in the compiler.

When you're parsing the token you just need to take a gander at the main character to decide whether it's an identifier or exacting and afterwards send it to the right capacity for handling. With the goal that's an exhibition advancement.