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WEEK 6.
TOPIC: BASIC PROGRAMMING (II)
CONTENT:
(a)Built –in functions: (i)SQR (ii)INT (X) (iii) SIN (X) (iv)ABS (X) (v)RND (X) (vi)TAN (X) (viii)LOG (X) (ix) EXP (X) (b)BASIC notation of : (i)√b2 -4ac2a (ii) (x-y)/(x+y) (iii) (a+b) + c/Sin d (iv)ex+y –Sin (x+ny), (v)b = 1/4ac, etc. (c)BASIC program to: (i)find square root of numbers within a given range (ii)find square root ,S, round up to an integer (iii) find the cosine of known values (iv) find the tangent of a given angle (d)Definition of (i)internet (ii)some basic terms :browse, browser, chartroom, cybercafé, cyber space, download-mail, home page, HTML, HTTP, internet service provider, intranet, upload, protocol, web page and website (e)Internet main browser: (i)Internet explorer (ii)Netscape Navigator (iii)Opera (iv) Firefox, etc.
Sub-Topic 1: BASIC BUILT –IN FUNCTIONS
These are Mathematical functions that are built into BASIC. Some common BASIC functions are shown in the table below:
| FUNCTION | MEANING |
| SQR (X) | Square root of X |
| INT (X) | Convert numeric value X to interger. |
| SIN (X+Y) | The Sine of the sum of X and Y. |
| ABS (X) | The absolute value of X. |
| RND (X) | Round up X to specified number of decimal places. |
| TAN (X) | The tangent of X |
| LOG (X) | The natural Logarithm of X |
| EXP (X) | The exponential of X |
BASIC notation/symbols.
(i)√b2 -4ac/2a
Solution: ((b^2-4*a*c)^(1/2))/(2*a) or ((b**2-4*a*c)^(1/2))/(2*a)
(ii) (x-y)/(x+y)
Solution: (x-y)/(x+y)
(iii) (a+b) + c/Sin d
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