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C++ Program for printing 6 different Triangle/Half Pyramid Programs with Incremental Numbers

#include<iostream>

using namespace std;

void halfPyramidNumbers1(int n) {

  for (int i = 1; i <= n; i++) {

    for (int j = 1; j <= i; j++) {

      cout << i;

    }

    cout << endl;

  }

}

void halfPyramidNumbers2(int n) {

  for (int i = n; i > 0; i--) {

    for (int j = 1; j <= i; j++) {

      cout << (n - i + 1);

    }

    cout << endl;

  }

}

void halfPyramidNumbers3(int n) {

  for (int i = 1; i <= n; i++) {

    for (int k = n - i; k > 0; k--)

      cout << " ";

    for (int j = 1; j <= i; j++) {

      cout << i;

    }

    cout << endl;

  }

}

void halfPyramidNumbers4(int n) {

  for (int i = n; i > 0; i--) {

    for (int k = n - i; k > 0; k--)

      cout << " ";

    for (int j = 1; j <= i; j++) {

      cout << (n - i + 1);

    }

    cout << endl;

  }

}

void halfPyramidNumbers5(int n) {

  for (int i = 1; i <= n; i++) {

    for (int j = 1; j <= i; j++) {

      cout << j;

    }

    cout << endl;

  }

}

void halfPyramidNumbers6(int n) {

  int x = 1;

  for (int i = 1; i <= n; i++) {

    for (int j = 1; j <= i; j++) {

      cout << x++ << " ";

    }

    cout << endl;

  }

}

int main() {

  int num;

  cout << "Enter number of levels of the pattern :" << endl;

  cin >> num;

  halfPyramidNumbers1(num);

  cout << endl;

  halfPyramidNumbers2(num);

  cout << endl;

  halfPyramidNumbers3(num);

  cout << endl;

  halfPyramidNumbers4(num);

  cout << endl;

  halfPyramidNumbers5(num);

  cout << endl;

  halfPyramidNumbers6(num);

  return 0;

}