return will terminate a function and send a value to its caller. The value returned is the result of an expression.
/* Declare Func */
int Func(void);
main()
{
/* Call Func and print its return value. */
printf("%d \n", Func());
}
/* Define Func. */
int Func(void)
{
return 7;
}
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What ever follows the return statement will be evaluated as an expression. So, to be consistant you could place brackets around the return value.
return(7);
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Or you could evaluate a formula.:
return (Count-1); |
If a function returns void the return statement is not required at the end of the function block.
If you need to leave a function before the end of the function block you can provide the return statement without an expression.
void CheckDate(int)
main()
{
CheckDate(40)
}
void CheckDate(int Month)
{
if (Month > 31)
{
return;
}
puts("Month is valid");
}
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There is no agreed convention on the data returned either. Depending on the author, one function can return a positive value to indicate an error and another function can return a zero to indicate error. The only way to be sure of what will be returned is to read the documentation associated with the function.
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