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21.	What is the difference between getch() and getche()?
	Integer data type allows a variable to store numeric values. The storage size of int data type is 2 or 4 or 8 byte. It varies depend upon the processor in the CPU. Character data type allows a variable to store only one character. Storage size of character data type is 1. Float data type allows a variable to store decimal values. Storage size of float data type is 4. This also varies depend upon the processor in the CP. Double data type is also same as float data type which allows up to 10 digits after decimal.
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22.	What is the difference between printf(), sprintf() and fprintf()?
	printf() is used to print the text or value of the variable in the screen. sprintf() is used to store the values in the character array or string. fprintf() is used to store the values of variable in the file.
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23.	What is the difference between scanf() and gets() function?
	In scanf() when there is a blank was typed, the scanf() assumes that it is an end. gets() assumes the enter key as end.
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24.	What is a syntax error?
	Syntax errors are associated with mistakes in the use of a programming language. It may be a command that was misspelled or a command that must was entered in lowercase mode but was instead entered with an upper case character. A misplaced symbol or lack of symbol, somewhere within a line of code can also lead to syntax error.
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