why is it that when I input 'a' as '2' in this short program, it gives me 'no output'. is there anything wrong with the if-statement nesting?.

Question

int main () {
int a;
cin >>a;
if (a==1){
cout<<"a is 1\n";
if (a==2){
cout<<"a is 2";
}}
return 0;
}

Answer 1

Your 'a==2' if statement is nested inside the 'a==1' if statement, so will only be reached if a=1 but will obviously never be true.

Where you have the two closing curly braces, you need to move one of them to close the first if statement.

if ( a == 1 ) {
cout << "a is 1";
}
if ( a == 2 ) {
cout << "a is 2";
}

Answer 2

You're (a == 2) if statement is inside the (a == 1) if statement.

Yours:

if (a == 1)
{
cout << "a is 1";
if (a == 2)
{
cout << "a is 2";
}
}

How it should be:

if (a == 1)
{
cout << "a is 1";
}
if (a == 2)
{
cout << "a is 2";
}

Answer 3

thanks guys..