APC-PRAC-023.c

Problem Statement

APC-PRAC-023.c

Pattern : (a) 1, -3, 5, -7, 9, -11, ... upto n times (b) 0, 3, 8, 15, ... upto n times

Source Code

#include <stdio.h>
#include <stdbool.h>

int main()
{
    int n, i, temp = 1;
    bool isNegative = true;
    printf("Enter the n : ");
    scanf("%d", &n);
    printf("\nPattern A :");
    for (i = 1; i <= n; i++)
    {
        if (!isNegative)
        {
            printf("  %d", temp * -1);
            isNegative = true;
        }
        else
        {
            printf("  %d", temp);
            isNegative = false;
        }
        temp += 2;
    }
    printf("\nPattern B :");
    for (i = 1; i <= n; i++)
    {
        temp = (i * i) - 1;
        printf("  %d", temp);
    }
    return 0;
}

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● Author - Amit Dutta · Updated - 12 Dec 2025