Java Program to Print Trapezium Character Pattern

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Program to Print Trapezium Character Pattern

In the previous article, we have discussed Java Program to Print Double Sided Stair Case Character Pattern

In this article we are going to see how to print the trapezium character pattern.

Example-1:

When characters in first line value=6 and lines value = 3

                           ABCDEF
                       ABCDEFGHIJ
                  ABCDEFGHIJKLMN

Now, let’s see the actual program to print it.

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Approach:

  • Enter total number of characters in first line and store it in an integer variable size.
  • Then take total number of lines and store it in an integer variable lines.
  • Take one outer for loop to iterate the lines.
  • Take two inner for loops, one to print the space and the other one to print the character.
  • After each iteration print a new line.

Java Code to Print Trapezium Character Pattern

import java.util.Scanner;
class Main
{
    public static void main(String[] args)
    {
            Scanner scan = new Scanner(System.in);
            
            // Starting ASCII value taken 65
            int asciiAlpha = 65;
            // Taking size as input from user
            // enter even number (prefered)
            System.out.print("characters in first line : ");
            int size = scan.nextInt();
    
            // number of stars in the first line 
            // and spaces in our pattern
            int stars = size, spaces = size*2;
    
            //Taking number of lines 
            // to print as input from the user
            // enter even number (prefered)
            System.out.print("Lines : ");
            int lines = scan.nextInt();
    
    
            // Outer loop for specified number of lines
            for(int r = 0; r < lines; r++){
                // Loop to print spaces
                for(int c = spaces; c > 1; c--){
                    System.out.print("  ");
                }           
                // loop to print characters
                for(int j = 0; j < stars; j++){
                    System.out.print((char)(j + asciiAlpha));
                }
                //Prints a newline
                System.out.println();
    
                // deccreases the number of spaces and 
                // increases the number of stars 
                // for each iteration
                spaces--;
                stars = stars+4;
            }
    }
}
Output:

characters in first line : 2
lines : 4

            AB
        ABCDEF
    ABCDEFGHIJ
ABCDEFGHIJKLMN

C Code to Print Trapezium Character Pattern

#include <stdio.h>
int main()
{
    printf("characters in first line : ");
    //Taking size as input from user
    int size;
    scanf("%d", &size);
    //number of stars in the first line and spaces in our pattern
    int stars = size, spaces = size * 2;
    //Taking number of lines to print as input from the user
    printf("Lines : ");
    int lines;
    scanf("%d", &lines);
    
    // Starting ASCII value taken 65
    int asciiAlpha = 65;
            
    //Outer loop for specified number of lines
    for (int r = 0; r < lines; r++)
    {
        //Loop to print spaces
        for (int c = spaces; c > 1; c--)
        {
            printf("  ");
        }
        //loop to print spaces
        for (int j = 0; j < stars; j++)
        {
            printf("%c",(j + asciiAlpha));
        }
        //Prints a newline
        printf("\n");
        //decreases the number of spaces and 
        //increases the number of stars for each iteration
        spaces--;
        stars = stars + 4;
    }
    return 0;
}
Output:

characters in first line : 2
lines : 4

            AB
        ABCDEF
    ABCDEFGHIJ
ABCDEFGHIJKLMN

C++ Code to Print Trapezium Character Pattern

#include <iostream>
using namespace std;
int main(int argc, char const *argv[])
{
    cout << "characters in first line : ";
    //Taking size as input from user
    int size;
    cin >> size;
    //number of stars in the first line and spaces in our pattern
    int stars = size, spaces = size * 2;
    //Taking number of lines to print as input from the user
    cout << "Lines : ";
    int lines;
    cin >> lines;
    
    // Starting ASCII value taken 65
    int asciiAlpha = 65;
            
    //Outer loop for specified number of lines
    for (int r = 0; r < lines; r++)
    {
        //Loop to print spaces
        for (int c = spaces; c > 1; c--)
        {
            cout << "  ";
        }
        //loop to print spaces
        for (int j = 0; j < stars; j++)
        {
            cout << (char)(j + asciiAlpha);
        }
        //Prints a newline
        cout << endl;
        //decreases the number of spaces and
        // increases the number of stars for each iteration
        spaces--;
        stars = stars + 4;
    }
    return 0;
}
Output:

characters in first line : 2
lines : 4

            AB
        ABCDEF
    ABCDEFGHIJ
ABCDEFGHIJKLMN

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