how if(a) works ?

Question

a=0;
if(a)
cout<<1; else cout<<2;

when a=0 outputs is 2 but if a =! 0 output is 1
can someone explain me how if makes this decision?

https://code.sololearn.com/cj54uKKhhL5s/?ref=app

Answer 1

The 0 means false
That is if (false)
1 means true
That is if (true)

The if will execute only the expression returns true ,and go to the else part if it is false.

#include <iostream>
using namespace std;
int main() {
if(false) cout<<1; else cout<<2;
return 0;
}