half triangle pattern.py

# (upper half - repeat)
# 1
# 22
# 333

# (upper half - incremental)
# 1
# 12
# 123

# (lower half - incremental)
# 123
# 12
# 1

# (lower half - repeat)
# 333
# 22
# 1


def main():
    lines = int(input("Enter no.of lines: "))
    pattern = input("i: increment or r:repeat pattern: ").lower()
    part = input("u: upper part or l: lower part: ").lower()

    match pattern:
        case "i":
            if part == "u":
                upper_half_incremental_pattern(lines)
            else:
                lower_half_incremental_pattern(lines)

        case "r":
            if part == "u":
                upper_half_repeat_pattern(lines)
            else:
                lower_half_repeat_pattern(lines)

        case _:
            print("Invalid input")
            exit(0)


def upper_half_repeat_pattern(lines=5):
    for column in range(1, (lines + 1)):
        print(f"{str(column) * column}")


def lower_half_repeat_pattern(lines=5):
    for length in range(lines, 0, -1):
        print(f"{str(length) * length}")


def upper_half_incremental_pattern(lines=5):
    const = ""
    for column in range(1, (lines + 1)):
        const += str(column)
        print(const)


def lower_half_incremental_pattern(lines=5):
    for row_length in range(lines, 0, -1):
        for x in range(1, row_length + 1):
            print(x, end="")
        print()


if __name__ == "__main__":
    main()