The symbol “++” is known as increment operator that is by this operator the value of a variable can be increased by 1. The symbol “–” is known as decrement operator that is by this operator the value of a variable can be decreased by by 1. before or after a variable we can use increment or decrement operator. Such as ++i, k– where i and k are integer type of variable.

There may be more than one function in c-programming language but always from the main() function, the statements or c-programming cods is stared to execute.”=”is a assignment statement of c-programming. There are some words in c-programming language whose activities of funcations are knows by c-compiler beforehand. these known words are known as c-tokens or key word or reserved word e.g. printf(), scanf(), int, float, getch() are c-tolen

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