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Can a function be defined without a return statement?
If no return statement appears in a function definition, control automatically returns to the calling function after the last statement of the called function is executed. In this case, the return value of the called function is undefined. If a return value isn’t required, declare the function to have void return type.
Which function does not return value in C?
void
Return Type In C there are no subroutines, only functions, but functions are not required to return a value. The correct way to indicate that a function does not return a value is to use the return type “void”. ( This is a way of explicitly saying that the function returns nothing. )
Does a function always return a value in C?
Answer: c function only has to return a value if the return type of the function in non void i.e if the return type is int,float,double etc. another importent point to note here is that a non void function can always return ONLY ONE value,a function cannot return multiple values……
Do all functions have a return value?
To return a value other than the default, a function must have a return statement that specifies the value to return. A function without a return statement will return a default value. For all other functions, the default return value is undefined .
Can a function not return a value in C?
As an aside, in C, you wouldn’t actually have undefined behavior — in C, you get undefined behavior only if you try to use the return value, and the function didn’t specify a value to return. The compiler should have issued at least a warning for not including a return statement in show ().
What happens if a function fails to return a value?
If a function is declared to return a value, and fails to do so, the result is undefined behavior (in C++).
How to write function with arguments but no return value?
Function with arguments but no return value : When a function has arguments, it receive any data from the calling function but it returns no values. Syntax : Function declaration : void function ( int ); Function call : function( x ); Function definition: void function( int x ) { statements; }.
Can a function be called without an argument in C?
A function in C can be called either with arguments or without arguments. These function may or may not return values to the calling functions. All C functions can be called either with arguments or without arguments in a C program. Also, they may or may not return any values. Hence the function prototype of a function in C is as below: