return
statement terminates the execution of a function and returns control to the calling function. Execution resumes in the calling function at the point immediately following the call. A return
statement can also return a value to the calling function. See Return Type for more information.void
, a return
statement containing an expression generates a warning and the expression is not evaluated.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 is not required, declare the function to have void
return type; otherwise, the default return type is int
.return
statement. The free range cook book free download full. However, C does not require the parentheses. https://entrancementbrilliant812.weebly.com/blog/4chan-g-dev-c.return
statement:main
function calls two functions: sq
and draw
. The sq
function returns the value of x * x
to main
, where the return value is assigned to y
. The parentheses around the return expression in sq
are evaluated as part of the expression, and are not required by the return statement. Since the return expression is evaluated before it is converted to the return type, sq
forces the expression type to be the return type with a cast to prevent a possible integer overflow, which could lead to unexpected results. The draw
function is declared as a void
function. It prints the values of its parameters and then the empty return statement ends the function and does not return a value. An attempt to assign the return value of draw
would cause a diagnostic message to be issued. The main
function then returns the value of x
to the operating system.