QBASIC is a modular programming taught in SEE Class 10 Computer Science. Modular Programming in QBASIC are done using Sub Module and Function Module. Here are some of the program example of series and patterns generated using function only.

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Series and Pattern using function in QBASIC

Generate 1 2 3 4 5 …….10th term

DECLARE FUNCTION num(c) 
c=0 
FOR i = 1 TO 10 
PRINT num(c) 
NEXT i 
END
FUNCTION num(c) 
c=c+1 
num = c 
END FUNCTION

Generate 1 4 9 16  …….10th term

DECLARE FUNCTION num(i) 
FOR i = 1 TO 10 
PRINT num(i) 
NEXT i 
END
FUNCTION num(i)  
x=i^2
num = x
END FUNCTION

Generate 3 12 27 48 75 …….10th term

DECLARE FUNCTION num(i) 
FOR i = 1 TO 10 
PRINT num(i) 
NEXT i 
END
FUNCTION num(i)  
x=3*i^2
num = x
END FUNCTION

Generate 5 25 125 …….10th term

DECLARE FUNCTION num(i) 
FOR i = 1 TO 10 
PRINT num(i) 
NEXT i 
END
FUNCTION num(i)  
x=5^i
num = x
END FUNCTION

Generate 1 121 12321 1234321 123454321 …….10th term

DECLARE FUNCTION num(c) 
c=0
FOR i = 1 TO 10 
c=c*10+1
PRINT num(c) 
NEXT i 
END
FUNCTION num(c)  
x=c^2
num = x
END FUNCTION