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In this lesson, you create a layout in XML that includes a text field and a button. In the next lesson, your app responds when the button is pressed by sending the content of the text field to another activity. The graphical user interface for an Android app is built
In the previous lesson, you created an Android project that displays "Hello World." You can now run the app on a real device or on an emulator. If you don't have a real device available, skip to Run on an Emulator. Run on a Real Device
This lesson shows you how to create a new Android project with Android Studio and describes some of the files in the project. In Android Studio, create a new project: If you don't have a project opened, in the Welcome to Android Studio window, click Start a new
This quiz is based on this Array - C Programming tutorial. So, To get better score on quiz, read the tutorial first. Poll Maker
The do.... while loop checks its condition at the bottom of the loop. A do.... while loop is similar to a while loop. The one difference is that the do.... while loop is guaranteed to execute at least one time. Syntax: do { statement(s); }while(condition); Example: int a=0;
A for loop is a repetition control structure that allows you to efficiently write a loop that executes a specific number of times. Syntax: for(init;condition;increment ) { statement(s); } The init step is executed first, and does not repeat. Next, the condition is evaluated, and the body of the
Loops: A loop repeatedly executes a set of statements until a particular condition is satisfied. A while loop statement repeatedly executes a target statement as long as a given condition remains true. Syntax: while(condition) { statement(s); } The loop iterates while the condition is true. The loop's body
Nested if statements: You can also include, or nest, if statements within another if statement. For example: int mark = 100; if (mark >= 50) { cout << "You passed." << endl; if (mark == 100) { cout <<"Perfect!" << endl; } } else { cout <<
Additional relational operators: Operator Description Example == Equal to 4==2 False <= Less than or equal to 4<=2 False >= Greater than or equal to 4>=2 True != Not equal to 4!=2 True Example: if(10==10) { cout<<"Yes"; } Output: Yes The
Else statement: An if statement can be followed by an optional else statement, which executes when the condition is false. Syntax: if(condition) { //statements } else { //statements } The compiler will test the condition: :-If it evaluates to true, then the code inside the if statement will be executed If it evaluates
Decision Making: The if statement is used to execute some code if a condition is true. Syntax: if(condition) { //statements } The condition specifies which expression is to be evaluated. If the condition is true,the statements in curly brackets are executed. If statement: Use relational operators to evaluate conditions. For
Assignment Operator: The simple assignment operator (=) assigns the right side to left side. C++ provides shorthand operators that have the capability of performing an operation and an assignment at the same time. For example: int x=5; x+=3; //It's mean x=x+3 x-=2; //It'
Arithmetic Operators: C++ supports these arithmetic operator. Operator Symbol Form Addition + x+y Subtraction - x-y Multiplication * x*y Division / x/y Modulus % x%y Addition: The addition operator adds its operands together. int x=2+3; cout<<x; Output: 5 Subtraction: The subtraction operator subtr
User input: To enable the user to to input a value,use cin in combination with the extraction operator (>>). The variable containing the extracted data follows the operator. The following example shows how to accept user input and store it in the num variables. For example: int num;
Write a program in C++ to print a massage on output screen. #include<iostream> using namespace std; int main() { cout<<"Hello world"; return 0; } Output: Hello world Write a program in C++ to print an integer value. #include<iostream> using namespace std;