Basic: A Hands-On Method by Herbert D. Peckham PDF
By Herbert D. Peckham
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Extra info for Basic: A Hands-On Method
1st: Exponentiation 2nd: Multiplication and division 3rd: Addition and subtraction Power does seem to corrupt! 740 LET G = A MB Now if we go back to our example of 2+3~2/5~l we scan left to right for any exponentiation. Since there is an exponentiation indicated (312), it is done first. Now the expression is 2+9/5-1 Scanning from leftto right, we look forexponentiation, and finding none, look forthe operations with the next highest priority (multiplication and division). The division is therefore done next, with the following result: 2+1*8-1 Computer Arithmetic and Program Management 49 Since there are no more multiplications or divisions left in the expression, we scan from left to right for addition and subtraction.
The computer will then go to line 110, type out a question mark, halt, and wait for you to type in a value of B. Type in 20. What did the computer print out? 3. Now type 120 LET C = A-B Display the program. If you execute the program and at the first question mark (INPUT prompt) type in 30 for A and the second prompt type in 12 for B, what will the computer type out? Try it and record what was typed out. What arithmetic operation is done with the - in line 120? 34 BASIC: A Hands-on Method 4. Type 120 LET C « A*B Display the program.
What is the I (or a) symbol used for? 10. ) that when a number is to be multiplied by itself three times, for Computer Arithmetic and Program Management 37 example, we can indicate this with an exponent. If the number were 2, we would write the expression as 23 How would this expression be written in BASIC using the t (or a ) symbol? ) 11. Fill in the operators (symbols) that call for the following arithmetic operations: Division Addition Exponentiation Subtraction Multiplication 38 BASIC: A Hands-on Method 12.
Basic: A Hands-On Method by Herbert D. Peckham