# C – Arithmetic Operations

Writing code with C language, we use some arithmetical terms. Thanks to these terms , we can do easily arithmetical operations. In this essay , I will make program , using with the arithmetical terms. Some Arithmetic terms and their meanings ;

To increase the count by 1: number++ , ++number , number+=1

To sum the number with another number: number+=5 , number = number + 5

To decrease the count by 1: number – – , – -number , number – =1

To reduce the number with another number : number -=5 , number = number – 5

To multiply or divide a number by a number : number = number * 5 , number = number / 5

#include<stdio.h> int main() { int a=5 , b=7 , c=6 ; printf("a=%d , b=%d , c=%d\n",a,b,c); a=a*b; b=b+b; c++; printf("a=%d , b=%d , c=%d\n",a,b,c); /* Value of a is change because we make the a a*b Same thing happen the b and c . */ a--; b=a+c; c= c-7; printf("a=%d , b=%d , c=%d\n",a,b,c); return 0; }

Screen Output :

a=5 , b=7 , c=6 a=35 , b=14 , c=7 a=34 , b=41 , c=0

In above , In code syntax we use some terms like \n .There are terms in C like that. Some of the terms and their meanings ;

\n : Bottom line down.

\t : Leave a tab space.

\r : It makes a new line.

\\ : \ Makes this sign on the screen.

/* */ : Make comment lines.

// : Make a comment line . Comment lines do not appear on the screen.

I will make a program, using with the while loops . Program will take numbers from the user and count the taken numbers.

#include<stdio.h> int main() { int number1 , number2 , sum = 0 ; while(1){ printf("Enter the first number:"); scanf("%d",&number1); printf("Enter the second number:"); scanf("%d",&number2); sum = number1 + number2 ; printf("Sum of the entered numbers : %d \n\n",sum); } return 0; }

Screen Output ;

Enter the first number: 5 Enter the second number: 5 Sum of the entered numbers : 10 Enter the first number: 8 Enter the second number: 9 Sum of the entered numbers : 17 Enter the first number: 54 Enter the second number: 15 Sum of the entered numbers : 69 Enter the first number: 235 Enter the second number: 48 Sum of the entered numbers : 283