Frequent question: What is IF statement in Python?

What is an if statement used for in Python?

In a Python program, the if statement is how you perform this sort of decision-making. It allows for conditional execution of a statement or group of statements based on the value of an expression.

What is an if statement used for?

The IF statement is a decision-making statement that guides a program to make decisions based on specified criteria. The IF statement executes one set of code if a specified condition is met (TRUE) or another set of code evaluates to FALSE.

What is if else statement in Python with example?

Example: Python if Statement

In the above example, num > 0 is the test expression. The body of if is executed only if this evaluates to True . When the variable num is equal to 3, test expression is true and statements inside the body of if are executed.

What is the main difference between if and while?

Meaning an if statement gives you once the possibility to do something or not (or something else). Whereas a while loop does things as long as the condition is true.

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What is an if statement give two examples?

Below is a general example of an if statement, not specific to any particular programming language. … if (X < 10) { print “Hello John”; } In the example above, if the value of X were equal to any number less than 10, the program displays, “Hello John” when the script is run.

What is an if statement also known as?

An if statement includes a logical expression which is the ‘test. ‘ A logical expression is one that is either true or false. This is also called a Boolean expression. … The if statement is followed by a colon if x < 3: and a block of code.

How is if statement different from if else statement?

The if statement is a decision-making structure that consists of an expression followed by one or more statements. The if else is a decision-making structure in which the if statement can be followed by an optional else statement that executes when the expression is false.

What does == mean in Python?

The == operator compares the value or equality of two objects, whereas the Python is operator checks whether two variables point to the same object in memory. In the vast majority of cases, this means you should use the equality operators == and !=

How do you end an if statement in Python?

Exit an if Statement With break in Python

The break is a jump statement that can break out of a loop if a specific condition is satisfied. We can use the break statement inside an if statement in a loop. The main purpose of the break statement is to move the control flow of our program outside the current loop.

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Is if a looping statement?

An if statement checks if an expression is true or false, and then runs the code inside the statement only if it is true. The code inside the loop is only run once… A while statement is a loop. Basically, it continues to execute the code in the while statement for however long the expression is true.

Is while faster than if?

A WHILE statement loop will execute much faster than an IF statement loop in applications where the loop is placed many commands into a program. Consider, for example, a loop placed at the end of a very long program.

Do while instead of if else?

“If” makes a single decision, and moves on. “While” repeats its instructions until its test condition is no longer true. Well one reason is that ‘if’ statements will only run once when code is executed, ‘while’ loops will continue to run until the run condition is false.