Trust Coding : Programming: Print Character Pattern

Print Character Pattern (Alphabet Matrix Pattern) in C

In this tutorial, we will develop a C program to print the following character pattern:

A B C D
B C D E
C D E F
D E F G

Pattern Observation

Let’s analyze the pattern carefully:

The pattern contains 4 rows and 4 columns.
Each row starts from the next alphabet.
Characters increase sequentially in each row.

Row	Starting Character
1	A
2	B
3	C
4	D

We can see that each character is generated using ASCII values. The formula used is:


'A' + i + j

C Program


#include <stdio.h>

int main() {
    int i, j;
    int n = 4;   // Number of rows and columns

    for(i = 0; i < n; i++) {
        for(j = 0; j < n; j++) {
            printf("%c ", 'A' + i + j);
        }
        printf("\n");
    }

    return 0;
}

Explanation

1. Outer Loop (Rows)

The outer loop controls the rows (0 to 3).

2. Inner Loop (Columns)

The inner loop prints 4 characters in each row.

3. Character Logic


printf("%c ", 'A' + i + j);

When i = 0 → prints A B C D
When i = 1 → prints B C D E
When i = 2 → prints C D E F
When i = 3 → prints D E F G

This works because ASCII values of alphabets are consecutive.

Output

A B C D
B C D E
C D E F
D E F G

Time Complexity

Two nested loops each run n times. Therefore, the time complexity is O(n²).

Trust Coding : Programming

Print Character Pattern