Do…while loop in C programming

C programming supports three types of looping statements for loop, while loop and do...while loop. Among three do...while loop is most distinct loop compared to others.

do...while is an exit controlled looping statement. We use do...while loop when there is a need to check condition after execution of loop body. do...while loop in any case executes minimum once.

Continue reading Do…while loop in C programming

For loop in C programming

In real life we come across situations when we need to perform a set of task repeatedly till some condition is met. Such as – sending email to all employees, deleting all files, printing 1000 pages of a document. All of these tasks are performed in loop. To do such task C supports looping control statements.

For loop is an entry controlled looping statement. It is used to repeat set of statements until some condition is met.

Continue reading For loop in C programming

If…else…if vs switch…case, difference and usage?

if...else...if and switch...case both programming constructs has ability to take decision based on conditions. Both are almost similar in nature. However, there is always a debate among beginners which to use and when to use what?

In this post, I will compare both on various grounds. So let us begin.

Continue reading If…else…if vs switch…case, difference and usage?

switch…case statement in C

if...else statement provides support to control program flow. if statement make decisions based on conditions. It selects an action, if some condition is met. However, there exits situations where you want to make a decision from available choices. For example - select a laptop from available models, select a menu from available menu list etc.

switch...case statement gives ability to make decisions from fixed available choices. Rather making decision based on conditions. Using switch we can write a more clean and optimal code, that take decisions from available choices.

Continue reading switch…case statement in C

Nested if…else statement in C

Simple if and if...else...if statements provide a great support to control programs flow. Simple if is single condition based task i.e. "if some condition is true, then do the task". In contrast if...else...if statement provides multiple condition checks i.e. "if some condition is true, then do some task. If the condition is false, then check some other condition and do some task. If all conditions fails, then do some default task."

Continue reading Nested if…else statement in C

If…else and if…else…if statement in C

In previous post, I explained to control programs flow of execution using simple if statement.

Simple if works as "if some condition is true then do some tasks". It doesn't specifies what to do if condition is false. A good program must think both ways. For example - if user inputs correct account number and pin, then allow money withdrawal otherwise show error message to user.

Continue reading If…else and if…else…if statement in C

If statement in C

So far in our journey of learning C programming, we learned to write simple C programs, that executes in the sequence we write. A program that always executes in same sequence is worthless. The ability to control program flow and statements execution is worth.

if statement allows us to select an action based on some condition. It gives programmer to take control over a piece of code. Programmer can control the execution of code based on some condition or user input. For example - if user inputs valid account number and pin, then allow money withdrawal.

Continue reading If statement in C