Control Flow Examples

C Programming Decision Making and Loops Examples

You will find necessary examples to create programs containing loops and decision making statements in this article.
C Decision making and loops examples
To understand examples on this page, you should have the knowledge of following topics:
  1. if...else Statement
  2. for Loop
  3. while Loop
  4. break and Continue Statement
  5. switch...case

C Control Flow Examples

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C Program to Display Prime Numbers Between Two Intervals #33

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C Program to Display Prime Numbers Between Two Intervals Example to print all prime numbers between two numbers (entered by the user). This problem is solved using nested for loop and if...else statement. To understand this example, you should have the knowledge of following  C programming topics: C if...else Statement C Programming for Loop C Programming break and continue Statement Example #1: Display Prime Numbers Between two Intervals #include <stdio.h> int main () { int low , high , i , flag ; printf ( "Enter two numbers(intervals): " ); scanf ( "%d %d" , & low , & high ); printf ( "Prime numbers between %d and %d are: " , low , high ); while ( low < high ) { flag = 0 ; for ( i = 2 ; i <= low / 2 ; ++ i ) { if ( low % i == 0 ) { flag = 1 ; break ; } ...
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C Data Types

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C Programming Data Types In this tutorial, you will learn about data types and how to declare a variable in C programming. In C programming, variables or memory locations should be declared before it can be used. Similarly, a function also needs to be declared before use. Data types simply refers to the type and size of data associated with  variables  and functions. Data types in C Fundamental Data Types Integer types Floating type Character type Derived Data Types Arrays Pointers Structures Enumeration This tutorial will focus on fundamental data types. To learn about derived data types, visit the corresponding tutorial. int - Integer data types Integers are whole numbers that can have both positive and negative values but no decimal values. Example: 0, -5, 10 In C programming, keyword  int  is used for declaring integer variable. For example: int id; Here,  id  is a variable of type integer. You can de...
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List of all Keywords in C Language

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List of all Keywords in C Language This tutorial provides a brief information on all 32 keywords in C programming. Keywords in C Programming auto break case char const continue default do double else enum extern float for goto if int long register return short signed sizeof static struct switch typedef union unsigned void volatile while Description of all Keywords in C auto The auto keyword declares automatic variables. For example: auto int var1; This statement suggests that  var1  is a variable of storage class auto and type int. Variables declared within function bodies are automatic by default. They are recreated each time a function is executed. Since, automatic variables are local to a function, they are also called local variables.  break and continue The break statement makes program jump out of the innermost enclosing loop (while, do, for or switch statements) explicitly. The continue statement skips the certain state...
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C Programming Files I/O

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C Programming Files I/O There are a large number of functions to handle file I/O (Input Output) in C. In this tutorial, you will learn to handle standard I/O in C using fprintf(), fscanf(), fread(), fwrite(), fseek.and more. In C programming, file is a place on your physical disk where information is stored. Why files are needed? When a program is terminated, the entire data is lost. Storing in a file will preserve your data even if the program terminates. If you have to enter a large number of data, it will take a lot of time to enter them all. However, if you have a file containing all the data, you can easily access the contents of the file using few commands in C. You can easily move your data from one computer to another without any changes. Types of Files When dealing with files, there are two types of files you should know about: Text files Binary files 1. Text files Text files are the normal .txt files that you can easily create using Notepad ...
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Learn C Programming The Definitive Guide C is a powerful general-purpose programming language. It is fast, portable and available in all platforms. If you are new to programming, C is a good choice to start your programming journey. This is a comprehensive guide on how to get started in C programming language, why you should learn it and how you can learn it. TABLE OF CONTENTS ·         C Tutorials ·         What is C Programming? ·         Reasons to Learn C ·         Your First C Program ·         Recommended Books ·         Things to Remember What is C (Programming Language)? - The Basics Before getting started with C programming, lets get familiarized with the language first. C is a general-purpose programming language used for wide rang...
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While and Do...While Loop

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C Programming while and do...while Loop Loops are used in programming to repeat a specific block of code. After reading this tutorial, you will learn how to create a while and do...while loop in C programming. Loops are used in programming to repeat a specific block until some end condition is met. There are three loops in C programming: for loop while loop do...while loop while loop The syntax of a while loop is: while (testExpression) { //codes } where,  testExpression  checks the condition is true or false before each loop. How while loop works? The while loop evaluates the test expression. If the test expression is true (nonzero), codes inside the body of while loop are exectued. The test expression is evaluated again. The process goes on until the test expression is false. When the test expression is false, the while loop is terminated. Flowchart of while loop Example #1: while loop // Program to find factorial of a numb...
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C Operators

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C Programming Operators C programming has various operators to perform tasks including arithmetic, conditional and bitwise operations. You will learn about various C operators and how to use them in this tutorial. An operator is a symbol which operates on a value or a variable. For example:  +  is an operator to perform addition. C programming has wide range of operators to perform various operations. For better understanding of operators, these operators can be classified as: Operators in C programming Arithmetic Operators Increment and Decrement Operators Assignment Operators Relational Operators Logical Operators Conditional Operators Bitwise Operators Special Operators C Arithmetic Operators An arithmetic operator performs mathematical operations such as addition, subtraction and multiplication on numerical values (constants and variables). Operator Meaning of Operator + addition or unary plus - subtraction or unary minus * multiplica...
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