if statements c++ code example

Example 1: find_if c++ example

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

int main()
{
  vector<int> myvec {2, 5, 6, 10, 56, 7, 48, 89};
  vector<int>::iterator gt10 = find_if(myvec.begin(), myvec.end(), [](int x){return x>10;}); // >= C++11
  cout << "First item >   10: " << *gt10  << endl;
  
    //check if pointer points to myvec.end()
  if(gt10 != myvec.end()) {
    cout << "nf points to: " << *gt10 << endl;
  }
  else {
    cout << "item not found" << endl;
  }

  return 0;
}

Example 2: elseif c++

if( a == 10 ) {
      cout << "Value of a is 10" << endl;
   } else if( a == 20 ) {
      // if else if condition is true
      cout << "Value of a is 20" << endl;
   }

Example 3: C++ if else

#include<iostream>
using namespace std;

int main()
{
    int grade;

    cin >> grade;

    if( grade >= 60 )
        cout << "You Pass!" << endl;
    else
        cout << "You Fail..." << endl;

    return 0;
}

Example 4: if else program in c ++

// Program to check whether an integer is positive or negative
// This program considers 0 as a positive number

#include <iostream>
using namespace std;

int main() {
     int number;

    cout << "Enter an integer: ";
    cin >> number;
    if (number >= 0) {
        cout << "You entered a positive integer: " << number << endl;
    }
    else {
        cout << "You entered a negative integer: " << number << endl;
    }
    cout << "This line is always printed.";
    return 0;
}

Example 5: if c++

int x = 20;
int y = 18;
if (x > y) {
  cout << "x is greater than y";
}

Example 6: C++ if else

#include<iostream>
using namespace std;

int main()
{
    int grade;

    cin >> grade;

    if( grade >= 60 )
    {
        cout << "You Pass!" << endl;
    }
    else
    {
        cout << "You Fail..." << endl;
    }

    return 0;
}