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In this article, we have explained how to return last two digits of an Integer using functions and implemented the technique in C Programming Language.

# Table of contents

- Problem statement
- Approach to solve
- Implementation
- Output

# Problem statement

In this problem, we have to return last two digits of a number using functions.

For example, if input is 139245, then the last two digits (that is two least significant digits) are 45.

## Approach to solve

Following is the approach to solve this problem:

- First we create a function digit(int a). int a inside the bracket is the parameter.
- Then inside this function we return the last two digits of the number.
- We do modulus 100 of the number and store it in a variable b of data type int and return it.
- Then we create the function main
- We create a variable named input of the data type int and take input through argv
- argv is an array of strings and it has to be converted to int. This can be done by atoi.
`#include<stdlib.h>`

is to be included at the top of the program before the functions as we have written atoi.- Then we create a variable named answer to store the return type and then print it.

```
139245
last digit = 139245 % 10 = 5
last 2 digits = 139245 % 100 = 45
```

# Implementation

Following is the implemention of the code in C programming language:

```
#include<stdio.h>
#include<stdlib.h>
int digit(int a)
{
int b=a%100;
return b;
}
int main(int argc,char** argv)
{
int input=atoi(argv[1]);
int answer=digit(input);
printf("The last two digits of the number are %d",answer);
return 1;
}
```

# Output

Run the code as follows:

```
gcc code.c
./a.out 789
```

Following is the output of the program:

```
The two digits ater decimal point are 89
```

With this article at OpenGenus, you must have the complete idea of how to return last two digits of an Integer in C.