Consider the following function:
char fun(char c)
{
if(c>='A' && c <= 'Z')
{
return(c - 'A' + 'a');
}
else
{
return c;
}
}
The function fun()
1
Converts a lower case letter into upper case.
2
Converts a upper case letter into lower case.
3
Converts a letter into number.
4
None of the above