# C program to convert temperature from Fahrenheit to Celsius and Celsius to Fahrenheit.

In this C program, we are going to learn how to convert Fahrenheit to Celsius and Celsius to Fahrenheit?

## Problem statement

Here, we are implementing both of the conversations in single program only. Program will ask for the user to choose which operation, he wants?

In this choice 1 - Program will convert temperature from Fahrenheit to Celsius and choice 2 - program will convert temperature from Celsius to Fahrenheit.

## C temperature conversion program - Fahrenheit to Celsius and Celsius to Fahrenheit

```/* C Program to convert temperature from Fahrenheit to Celsius and vice versa.*/
#include <stdio.h>

int main()
{

float fh,cl;
int choice;

printf("\n1: Convert temperature from Fahrenheit to Celsius.");
printf("\n2: Convert temperature from Celsius to Fahrenheit.");
printf("\nEnter your choice (1, 2): ");
scanf("%d",&choice);

if(choice ==1){
printf("\nEnter temperature in Fahrenheit: ");
scanf("%f",&fh);
cl= (fh - 32) / 1.8;
printf("Temperature in Celsius: %.2f",cl);
}
else if(choice==2){
printf("\nEnter temperature in Celsius: ");
scanf("%f",&cl);
fh= (cl*1.8)+32;
printf("Temperature in Fahrenheit: %.2f",fh);
}
else{
printf("\nInvalid Choice !!!");
}
return 0;
}
```

### Output

```First Run:
1: Convert temperature from Fahrenheit to Celsius.
2: Convert temperature from Celsius to Fahrenheit.
Enter your choice (1, 2): 1

Enter temperature in Fahrenheit: 98.6
Temperature in Celsius: 37.00

Second Run:
1: Convert temperature from Fahrenheit to Celsius.
2: Convert temperature from Celsius to Fahrenheit.
Enter your choice (1, 2): 2

Enter temperature in Celsius: 37.0
Temperature in Fahrenheit: 98.60

Third Run:
1: Convert temperature from Fahrenheit to Celsius.
2: Convert temperature from Celsius to Fahrenheit.
Enter your choice (1, 2): 3

Invalid Choice !!!
```

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