Скачать или смотреть QBASIC Programming – Learn Library Functions Easily[p-6]

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In this video, we will learn about Library Functions in QBASIC with simple explanations and examples. Library functions are built-in functions that make programming easier by performing common tasks like mathematical calculations, string operations, and more.

Examples:

ABS(-25) → returns 25

SQR(81) → returns 9

LEN("HELLO") → returns 5

UCASE$("qbasic") → returns QBASIC

LTRIM$(" AI") → returns "AI"
Examples:
Math Library Functions in QBASIC

ABS(-45) → 45 (absolute value)

SQR(144) → 12 (square root)

INT(7.9) → 7 (integer part)

FIX(-7.9) → -7 (truncate decimal, different from INT with negatives)

RND → returns a random number between 0 and 1

SIN(0) → 0 (sine of angle in radians)

COS(0) → 1 (cosine of angle in radians)

TAN(3.14159 / 4) → 1 (tangent of 45 degrees in radians)

EXP(1) → 2.71828 (value of e^1)

LOG(100) → 2 (logarithm base 10 of 100)
By the end of this video, you will clearly understand how to use QBASIC library functions in your programs. Perfect for students and beginners learning programming!