Convert Lowercase to Uppercase without using the inbuilt function

Problem statement:- Program to Convert Lowercase to Uppercase without using the inbuilt function.

Data requirement:-

   Input Data:- str

  Output Data:-str

  Additional Data:- i

Program in C

Here is the source code of the C Program to Convert Lowercase to Uppercase without using the inbuilt function.

Code:

#include<stdio.h>
#include<string.h>
int main()
{
    char str[30];
    printf("Enter your String(Lower case):");
    scanf("%[^\n]",str);
    int i=0;
    //convert small letter string to capital letter string
    while(str[i]!='\0')
    {
        if(str[i]>96 && str[i]<123 )//if(str[i]>='a' && str[i]<='z')
            str[i]-=32;
        i++;
    }
    printf("Upper case String is :%s",str);
}

Input/Output:

Enter your String(Lower case):csinfo360.com
Upper case String is:CSINFO360.COM

Program in C++

Here is the source code of the C++ Program to Convert Lowercase to Uppercase without using the inbuilt function.

Code:

#include<iostream>
#include<cstring>
using namespace std;
int main()
{
    string str;
    cout<<"Enter your String(Lower case):";
    getline(cin,str);
    int i=0;
    //convert small letter string to capital letter string
    while(str[i]!='\0')
    {
        if(str[i]>96 && str[i]<123 )//if(str[i]>='a' && str[i]<='z')
            str[i]-=32;
        i++;
    }
    cout<<"Upper case String is: "<<str;
}

Input/Output:

Enter your String(Lower case):csinfo 360 com
Upper case String is: CSINFO 360 COM

Program in Java

Here is the source code of the Java Program to Convert Lowercase to Uppercase without using the inbuilt function.

Code:

import java.util.Scanner;
public class p7 {

public static void main(String[] args) {
Scanner cs=new Scanner(System.in);
String str,str2=" ";
char c = ' ';
System.out.println("Enter your String(Lower case):");
str=cs.nextLine();
str+='\0';
int i=0;
    ////convert small letter string to capital letter string
    while(str.charAt(i)!='\0')
    {
    if(str.charAt(i)>96 && str.charAt(i)<123 )//if(str.charAt(i)>='a' && str.charAt(i)<='z')
        c=(char)(str.charAt(i)-32);
        else
        c=(char)(str.charAt(i));
        str2+=c;
        i++;
    }
System.out.println("Upper case String is: "+str2);
cs.close();
}
}

Input/Output:

Enter your String(Lower case):
csinfo360
Upper case String is: CSINFO360

Program in Python

Here is the source code of the Python Program to Convert Lowercase to Uppercase without using the inbuilt function.

Code:

str=input("Enter the String(Lower case):")
i=0
ch=''
#convert capital letter string to small letter string
while len(str)>i:
    if str[i]>='a' and str[i]<='z' :
        ch+=chr(ord(str[i])-32)
    else:
        ch += chr(ord(str[i]))
    i+=1
print("Lower case String is:", ch)

Input/Output:

Enter the String(Lower case):csinfo
Upper case String is: CSINFO

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