Difference between revisions of "Mixly Block Category - Text"
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=String Length= | =String Length= | ||
Returns the length (number of characters) of the input String. Input can either be a direct user String or a variable that is a String. | Returns the length (number of characters) of the input String. Input can either be a direct user String or a variable that is a String. | ||
| − | + | ==Example== | |
Example 1: [length of "hello"] will return 5. | Example 1: [length of "hello"] will return 5. | ||
Revision as of 22:42, 15 February 2017
Contents
String
Input a sequence of characters. Used to assign text to a String value type or as an input parameter that accepts String objects.
Read more here: https://www.arduino.cc/en/Reference/String , https://www.arduino.cc/en/Reference/StringObject
Character
Input a character. Used to assign a character to a Char value type or as an input parameter that accepts Char objects.
Read more here: https://www.arduino.cc/en/Reference/Char
String Combination (Concatenation)
Appends the second input to the end of the first input. Then returns the resulting String. Inputs can either be user input (direct characters) or variables that are the String data type.
Example: ["abc" join "def"] will return "acbdef"
Read more here: https://www.arduino.cc/en/Tutorial/StringAdditionOperator
String to Number Datatype
Converts the String input (user input or String variable) into a numeric data type (Integer or Float) and returns it.
- toInt - Converts the input String into an Integer (int) data type.
- toFloat - Converts the input String into a Float (float) data type.
Example 1: [toInt "7.11"] returns 7 of int data type.
Example 2: [toFloat "7.11"] returns 7.11 of float data type
Note: Did you know that in the examples above that "7.11" is of data type String? Which is just a sequence of characters( 7, ., 1, 1).
Read more here: https://www.arduino.cc/en/Reference/StringToInt , https://www.arduino.cc/en/Tutorial/StringToIntExample , https://www.arduino.cc/en/Reference/StringToFloat , https://www.arduino.cc/en/Tutorial/StringToFloatExample
Numberic Datatype to String
Converts the input number to a String and returns it. Input can be a user value or in a numeric data type (int, float, double) variable.
Read more here: https://www.arduino.cc/en/Reference/StringConstructor
String Length
Returns the length (number of characters) of the input String. Input can either be a direct user String or a variable that is a String.
Example
Example 1: [length of "hello"] will return 5.
Example 2: var is a String variable that contains "6chars". [length of var] will return 6.
Read more here: https://www.arduino.cc/en/Reference/StringLength
Character Access in String
Return the Character in the String at the Index number. Each String object starts at index 0. Therefore, the first Character of a String is indexed at 0. If a String is of length 10. The last index is 9.
- Input String - User input string or a variable of String type. This is the String that the block will look accessible the Character at Index Number from.
- Index Number - The index number that this block will return the Character from the Input String.
Example
If the String is "Hello!". The Characters and their Indexing is shown below. The size of the String is 6.
| Index | 0 | 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|---|---|
| Character | H | e | l | l | o | ! |
- To access the first character H would be ["Hello!" char at 0].
- To access the character e would be ["Hello!" char at 1].
- To access the character o would be ["Hello!" char at 4].
- To access the last character ! would be ["Hello!" char at 5]. Note: 5 = 6 (size of the String) - 1
Read more here: https://www.arduino.cc/en/Reference/StringCharAt
String Content Comparison
- equals
- startsWith
- endsWith
