Curriculum

C basic

C Home

0/1

C Introduction

0/1

C Get Started

0/1

C Syntax

0/2

C Output

0/2

C Comments

0/1

C Variables

0/6

C Data Types

0/7

C Constants

0/1

C Operators

0/1

C Booleans

0/2

C If ... Else

0/5

C Switch

0/1

C Break and Continue

0/1

C While Loop

0/3

C For Loop

0/3

C Arrays

0/4

C Strings

0/3

C User Input

0/1

C Memory Address

0/1

C Pointers

0/2

C Functions

0/5

C Files

0/3

C Structures

0/1

C Enums

0/1

C Memory

0/6

Text lesson

Change Values

Change Variable Values

When you assign a new value to a variable that already exists, it replaces the previous value.

Example

int myNum = 15; // myNum is 15
myNum = 10; // Now myNum is 10

You can also assign one variable’s value to another:

Example

int myNum = 15;

int myOtherNum = 23;

// Assign the value of myOtherNum (23) to myNum
myNum = myOtherNum;

// myNum is now 23, instead of 15
printf(“%d”, myNum);

Alternatively, you can duplicate values into empty variables:

Example

// Create a variable and assign the value 15 to it
int myNum = 15;

// Declare a variable without assigning it a value
int myOtherNum;

// Assign the value of myNum to myOtherNum
myOtherNum = myNum;

// myOtherNum now has 15 as a value
printf(“%d”, myOtherNum);

Add Variables Together

To combine variables, you can utilize the + operator.

Example

int x = 5;
int y = 6;
int sum = x + y;
printf(“%d”, sum);