I am a newbie in Java programming. There're one question requesting us to construct an algorithm to sum up all the odd numbers from 0 to 100.
Is this consider an algorithm?
• Start
• set sum to 0
• set number counter to 1
• while number counter <= 100
• add 2 to the number counter
• sum = sum + number counter
• Print “sum”
• End
I say "yes". Would be an even better algorithm if you replaced "100" by "n" thus making it general
Note: order of execution in loop body has been altered.
Use psuedo code to express the algorithm:
• set sum to 0
• set number_counter to 1
• while number counter <= 100 do the following loop:
sum = sum + number_counter
add 2 to the number_counter
• Print sum
• End
Note: order of execution in loop body has been altered.
why?
Thx James =]
But if I change to n, will it not suitable for the title?
And tong, whats mean by order of execution in loop body has been altered?
If I were your prof I'd prefer to see the general case "n", but it may be safer for you to do exactly what he asks.
ok, thanks alot James! =]
set the value to 1 and increment the value with two in a loop, you'll get the desired result,
for(int i=1; i<100; i=i+2;)I mean that in the loop body, one should do the "sum = sum + number_counter;" first.
Otherwise the odd number 1 would be missing, and also the number 101 would be incorrectly included in the sum. In iSax's Algorithm, to do the updating on number_counter first, thus the odd number 1 was missing, and the odd number 101 is also incorrectly included in the sum.
Yes, you're right. Well spotted.
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