Lesson Notes By Weeks and Term - Senior Secondary School 2

SUBJECT: I.C.T

CLASS:  SS 2

DATE:

TERM: 3rd TERM

 
WEEK 3

TOPIC: BASIC PROGRAMMING II

BASIC BUILT IN FUNCTIONS 

These are Mathematical functions that are built into BASIC. Some common BASIC functions are shown below:

1. SQR(  )
2. ABS(  )
3. LOG (  )
4. SIN (  )
5. COS (  )
6. TAN (  )
7. INT  (  )
8. RND (  )
9. EXP (  )

SIMPLE BASIC PROGRAM TO ILLUSTRATE BUILT-IN FUNCTION

SQR – Finds the square root of a positive number.

10 PRINT SQR (275)

ABS – This displays the absolute value of a given number.

10 CLS

20 LET A = 10

30 LET B = 12

40 LET C = A + B

50 PRINT ABS(C)

60 END

LOG – Using natural logarithm.

10 CLS

20 PRINT LOG (56.5)

SIN – Finds the Sine of an angle.

10 CLS

20 PRINT SIN (45)

COS – Finds the Cosine of an angle.

10 CLS

20 PRINT COS (92)

TAN – Finds the tangent of an angle.

10 CLS

20 PRINT TAN (108)

EXP – Finds the exponential of a number.

10 CLS

20 PRINT EXP (4)

30 END

INT – Finds the integer of a real number.

10 CLS

20 PRINT INT (258.36)

30 END

READING ASSIGNMENT: HiiT @ School, Computer Studies for Senior Secondary Education. Chapter Five, pages 110.

WEEKEND ASSIGNMENT

OBJECTIVES

1. ………………… is a BASIC built in function used to find the integer of a real number. (a) INT     (b) EXP    (c) TAN     (d) COS
2. ………………… is a BASIC built in function used to find the tangent of a real number. (a) INT     (b) EXP    (c) TAN     (d) COS
3. ………………… is a BASIC built in function used to find the logarithm of a real number. (a) INT     (b) EXP    (c) LOG     (d) COS
4. ………………… is a BASIC built in function used to find the exponential of a real number. (a) EXP    (b) TAN     (c) COS     (d) SIN

5. ………………… is a BASIC built in function used to find the Sine of a real number. (a) EXP    (b) TAN     (c) COS    (d) SIN

THEORY

1. Write a BASIC program to compute the square root of numbers from 10 to 40
2. List and explain four (4) BASIC built in functions.