FUNCTIONS incrementing and decrementing

Question

#include <iostream>
using namespace std;

int main() {
int x = 0;
if (x++) // This part of the syntax is where my question is on the if (x++)
cout << "True \n";
else
cout << "False\n";
return 0;
}

// cout False

#include <iostream>
using namespace std;

int main() {
int x = 0;
if (++x) // This part lies my main question on the if(x++)
cout << "True \n";
else
cout << "False\n";
return 0;
}

// cout True

My question is why does it return "True " with the plus plus/ minus minus sign on the left and return "false" when the plus plus and minus minus sign is on the right side? Anyone can help :)

I have the concept for this just want some clarification from anyone.. Thanks

Answer 1

https://www.sololearn.com/learn/CPlusPlus/1610/?ref=app
This will help you!

In post increment,
X++ will not get updated I mean incremented but it will get incremented if we use the same x further...since,u have set x=0...it will be same in the if case though u increment so,if(0) is false so it jumps to else case.

But,++x will increment the value of x by 1 before it is applied to the current step

Answer 2

Simangolwa Lifwatila you declared x=0 initially.

Case 1 : if (x++) here x value is used then incremented like if(0) then x+1.. so conditions returns false else case printed.

Case 2 : if(++x) here x value incremented before check conditions that is pre-increment. Like if(1) so if case true then print true.

Hope you clear 👍

Answer 3

1 and 0 have boolean counterparts in C(pp). See this, might help:

https://code.sololearn.com/cn2E0C06DZdm/?ref=app

Answer 4

Thanks Chaithra Gowda👑 Sandra Meyer 👍

Answer 5

I got confused without the numbers but year it's clear now thanks AZHAGESAN S