ASCII (which stands for American Standard Code for Information Interchange) is a character encoding standard for text files in computers and other devices.ASCII is a subset of Unicode and is made up of 128 symbols in the character set. These symbols consist of letters (both uppercase and lowercase), numbers, punctuation marks, special characters and control characters. PHP, ASP, ASP.NET, VB.NET, C#, Java, jQuery, Android, iOS, Windows Phone. The PHP chr function is used to generate a single byte string from a number. In another words we can say that it returns a character from specified ASCII value.
Chr(13) and chr(10) return the ASCII representations of 'Carriage return' and 'Line feed'. These characters can also be written as ' r ' in PHP. On a Windows system, CR+LF together represent a newline. (See What is the difference between r and?). The PHP chr function is used in PHP to change any specified ASCII value in to a single character string. This chr function is an in-built function of PHP. We pass any ASCII value as the parameter of this function and in return we get a string of characters from the given specified ASCII value.
There are three methods to print the alphabets in a triangle or in a pyramid form.
- range() with for loop
- chr() with for loop
- range() with foreach loop
- Two for loops are used.
- First for loop set conditions to print 1 to 5 rows.
- Second for loop set conditions in decreasing order.
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Using range() function
This range function stores values in an array from A to Z. here, we use two for loops.
Using chr() function
Here the chr() function returns the value of the ASCII code. The ASCII value of A, B, C, D, E is 65, 66, 67, 68, 69 respectively. Here, also we use two for loops.
Using range() function with foreach
In this methods we use foreach loop with range() function. The range() function contain values in an array and returns it with $char variable. The for loop is used to print the output.
Php Chr Codes
in BASIC ROM:
|List of all BASIC keywords|
Remark: This article describes the BASIC function CHR$ in BASIC V2 at the Commodore 64.
CHR$ can be used to convert a number between 0 and 255 into an ASCII character (of string type) and is the inverse function of ASC.
The argument expression is implicitly taken as integer value. Numbers outside the range - either negative or greater than 255 - leads to the BASIC error ?ILLEGAL QUANTITY ERROR. If an incorrect variable type is used, the BASIC error ?TYPE MISMATCH ERROR appears. In case the numerical argument is missing, the BASIC error ?SYNTAX ERROR is issued.
If you include the converted ASCII code of a control character, its function can be executed by using the BASIC command PRINT.
Special unquoteable characters:
giving output (for input 'Peter')
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ABS AND ASC ATN CHR$ CLOSE CLR CMD CONT COS DATA DEF DIM END EXP FN FOR FRE GET GET# GOSUB GOTO IF INPUT INPUT# INT LEFT$ LEN LET LIST LOAD LOG MID$ NEW NEXT NOT ON OPEN OR PEEK π POKE POS PRINT PRINT# READ REM RESTORE RETURN RIGHT$ RND RUN SAVE SGN SIN SPC SQR STATUS/ST STEP STOP STR$ SYS TAB TAN THEN TIME/TI TIME$/TI$ TO USR VAL VERIFY WAIT