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Introduction [cont'd]
Input Output Functions [cont'd]
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Return Value in User-defined Functions of Programming in C
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Return Value 
Functions with only return values, this type of functions can be defined only the purpose of returning some values from the function.
Program
	#include
	float pi(void);
	void main(){
	   printf("%f",pi());
	}
	float pi(void){
	   return 3.14;
	}
Output 
3.140000
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