C program to convert Uppercase to Lowercase - My CS Tutorial

C program to convert a sentence in upper case letter to lower .
In this tutorial we will learn how to write a c program that convert the sentence upper to lower and vice versa.

C program code

#include<stdio.h>
#include<conio.h>
#include<string.h>
void main()
{
    int x;
    char str1[100],str2[100]={0};
    printf("\n ENTER A SENTENCE TO CONVERT UPPER TO LOWER:\n \n ");
 
    gets(str1);
for(x=0;x<strlen(str1);x++)
{
    if(str1[x]>='a'&&str1[x]<='z')
    {
        str2[x]=(char)str1[x]-32;
    }
    else if(str1[x]>='A'&&str1[x]<='Z')
    {
        str2[x]=(char)str1[x]+32;
    }
    else
    {
        str2[x]=str1[x];
    }
}
printf("\n THE CONVERTED SENTENCE IS:-\n\n %s\n ",str2);
getch();
}

OUTPUT:

In this output we can see that we will enter a sentence and it is convert upper case letter to lower case letter and lower case letter to upper case letter.

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Created by-- HARSH CHAUHAN