how to count letters appeared?

[mijan]

How to count freqency of letters appeared in a textbox as input?Let say we type 'I believe', thus the code should count how many each letter appears and also in percentage. e.g. Letter 'E', Frequency = 3, percentage = 0.3 % (out of all letters) Any code example on this? thank you~ mijan

[Colin Angus Mackay]

mijan wrote:

How to count freqency of letters appeared in a textbox as input

Homework question? How do you think the problem would be solved? Here are some highlevel hints: Create some way to map letters to a count. Iterate through the string and add one to the relevant count for each letter you encounter. Add one also to an total counter (so you know how many letters there are in total, so you can work out the percentage) When you finish the iteration of the string, iterate through the map and output the frequency of each letter and its percentage (by the way, you need to work on that calculation as the letter 'E' occurs 37.5% of the time, not 0.3%) If you have a problem on any particluar aspect, show us what you tried and then we can help you fix it. ColinMackay.net Scottish Developers are looking for speakers for user group sessions over the next few months. Do you want to know more?

[mijan]

I've tried using javascript, which kind of easier.I only tried out two letter which 'a' and 'b'..how can i proceed until 'z' in much easier way? var letter, length, total, percent; total = 0; total1 = 0; letter = window.prompt('Please enter a letter', ''); length = letter.length; var my_array = letter.split(""); for(var i=0;i<length;i++){ if( my_array[i] == 'a' ){ total++; percent = total/length * 100; } if (my_array[i] == 'b' ) { total1++; } } document.write('The number of \'a\'s you have input is ' + percent) document.write( 'The number of \'b\'s you have input is ' + total1) mijan

[Colin Angus Mackay]

mijan wrote:

I've tried using javascript

Given that this is the Visual Basic.NET forum, I would have expected you to be using that. Anyway, did you think of using an array to hold the totals in? Create an array with 26 elements starting each at 0. item[0] represents A; item[1] represents B; and so on........ ColinMackay.net Scottish Developers are looking for speakers for user group sessions over the next few months. Do you want to know more? -- modified at 11:21 Thursday 2nd March, 2006