println("The strings are not equal."); } 3.3 String 类的compareTo() 方法 compareTo() 方法用于按字典顺序比较两个字符串。 语法:int compareTo(const String &other) const; 返回值:如果当前字符串小于、等于或大于另一个字符串,则分别返回负整数、0或正整数。 示例: cpp String str1 = "abc...
The “!=” operator in Arduino code means “not equal to.” This is a comparison operator used to evaluate if two values are not the same. In an Arduino program, this operator can be used to check whether a variable has a certain value or not. For example, you could compare two numb...
void loop() { // two strings equal: if (stringOne == "this") { Serial.println("StringOne == \"this\""); } // two strings not equal: if (stringOne != stringTwo) { Serial.println(stringOne + " =! " + stringTwo); } // two strings not equal (case sensitivity matters): st...
= y (x is not equal to y) x y (x is greater than y) x = y (x is greater than or equal to y) 警告:小心偶然地使用单个等号(例如if(x = 10))。单个等号是赋值运算符,这里设置x为10(将值1 31、0存入变量x)。改用双等号(例如if (x = 10)),这个是比较运算符,用于测试x是否等于10...
• = (assignment operator) • + (addition) • - (subtraction) • * (multiplication) • / (division) • % (modulo) Comparison Operators 比较运算符 • == (equal to) • != (not equal to) • < (less than) • > (greater than) ...
In the DigitallnputPullup program, there is a relational operator ==, which is not the same as the assignment operator =, and the double equal sign is an operation used in the expression of the if statement to determine whether the expression can be true. The single equal sign is used ...
=(assignment operator) Comparison Operators !=(not equal to) <(less than) <=(less than or equal to) ==(equal to) >(greater than) >=(greater than or equal to) Boolean Operators !(logical not) &&(logical and) ||(logical or)
=(assignment operator) +(addition) –(subtraction) *(multiplication) /(division) %(modulo) Comparison Operators ==(equal to) !=(not equal to) <(less than) >(greater than) <=(less than or equal to) >=(greater than or equal to) ...
== equal to = not equal to < less than > greater than <= less than or equal to >= greater than or equal to 布尔运算符 && and || or not 指针运算符 * dereference operator & reference operator 位运算符 & bitwise and | bitwise or ^ bitwise xor ~ bitwise not << bitshift left...
=y(xisnot equaltoy) x y(xisless thany) x y(xisgreaterthany) x =y(xisless thanorequalto y) x =y(xisgreaterthanorequal toy) 警告: 偶然地使用单个等号(例如if(x =10))。单个等号是赋值运算符,这里 设置x为10(将值10存入变量x)。改 等号(例如if (x 10)),这个 是比较运算符,用于...