(:source http://github.com/arduino/Arduino/raw/master/build/shared/examples/08.Strings/StringComparisonOperators/StringComparisonOperators.ino lang=arduino tabwidth=4:)

(:source http://github.com/arduino/Arduino/raw/master/build/shared/examples/8.Strings/StringComparisonOperators/StringComparisonOperators.ino lang=arduino tabwidth=4:)

String Comparison Operators

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Hardware Required

• Arduino Board

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There is no circuit for this example, though your Arduino must be connected to your computer via USB.

image developed using Fritzing. For more circuit examples, see the Fritzing project page

(:source http://github.com/arduino/Arduino/raw/master/build/shared/examples/8.Strings/StringComparisonOperators/StringComparisonOperators.pde lang=arduino tabwidth=4:)

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 if (stringOne.equals(stringTwo)) {

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 if (stringOne ==stringTwo) {

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The greater than and less than operators evaluate strings in alphabetical order, on the first character where the two differ. So, for example "a" < "b" and "1" < "2", but "999"> "1000" because 9 comes after 1.

The operator == and the function equals() perform identically. It's just a matter of which you prefer. So

Examples > Strings

String Comparison Operatprs

The String comparison operators, ==, !=,>, < ,>=, <= , and the functionsequals() and equalsIgoreCase() allow you to make alphabetic comparisons between Strings. They're useful for sorting and alphabetizing, among other things.

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Hardware Required

No external hardware is required. (:divend:)

The operator == and the function @@equals() perform identically. It's just a matter of which you prefer. So

(:div class=code :) if (stringOne.equals(stringTwo)) {

is identical to

if (stringOne ==stringTwo) {

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The greater than and less than operators evaluate strings in alphabetical order, on the first character where the two differ. So, for example "a" < "b" and "1" < "2", but @@"999"> "1000" because 9 comes after 1.

Caution: String comparison operators can be confusing when you're comparing numeric strings, because you're used to thinking of them as numbers, not strings. If you have to compare numbers, compare them as ints, floats, or longs, and not as Strings.

Circuit

(:div class=circuit :) There is no circuit for this example. (:divend:)

Code

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