1 개요
- uc
- upcase
- upper
- uppercase
- uppercaseString
- strtoupper
- toupper
- toUpperCase
2 Bash

Bash
Copy
echo "Hello, World" | tr 'a-z' 'A-Z'
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3 C
C
Copy
#include <ctype.h>
#include <stdio.h>
int main(void) {
char string[] = "Wiki means fast?";
int i;
for (i = 0; i < sizeof(string); ++i) {
string[i] = toupper(string[i]);
}
puts(string); // WIKI MEANS FAST?
return 0;
}
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4 C++

C++
Copy
#include <iostream>
using namespace std;
string strtoupper(string str) {
for(auto &c: str) c = toupper(c);
return str;
}
int main() {
string str = "Hello World!";
string str2 = strtoupper(str);
cout << str << endl; // Hello World!
cout << str2 << endl; // HELLO WORLD!
}
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C++
Copy
#include <iostream>
#include <algorithm> // transform
using namespace std;
string strtoupper(const string str) {
string ret = str;
transform(ret.begin(), ret.end(),ret.begin(), ::toupper);
return ret;
}
int main() {
string str = "Hello World!";
string str2 = strtoupper(str);
cout << str << endl; // Hello World!
cout << str2 << endl; // HELLO WORLD!
}
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5 C#
C#
Copy
"Wiki means fast?".ToUpper(); // "WIKI MEANS FAST?"
6 Excel
PHP
Copy
=UPPER("Hello")
// HELLO
7 Go

Go
Copy
package main
import (
"fmt"
"strings"
)
func main() {
fmt.Print( strings.ToUpper("hello world") )
}
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8 Java
Java
Copy
String str = "Hello World!";
System.out.println(str.toUpperCase());
9 JavaScript
JavaScript
Copy
var str = "Hello World!";
console.log( str.toUpperCase() );
▶ | HELLO WORLD! |
10 Objective-C
Objective-C
Copy
NSString *str = @"Hello World!";
NSLog(@"%@", [str uppercaseString];
11 Perl
Perl
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$str = "Hello World!";
print uc($str);
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12 PHP
PHP
Copy
$str = "Hello World!";
echo strtoupper($str);
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13 Python

Python
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str = "Hello World!"
print( str.upper() )
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14 Ruby
Ruby
Copy
str = "Hello World!"
str2 = str.upcase
puts str2
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Ruby
Copy
str = "Hello World!"
str.upcase!
puts str
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15 Scheme
scheme
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(use-modules (srfi srfi-13))
(string-upcase "Wiki means fast?") ; "WIKI MEANS FAST?"
16 Windows Batch
batch
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@echo off
setlocal
set str2=
set "str=Hello World!"
for /f "skip=2 delims=" %%I in ('tree "\%str%"') do if not defined str2 set "str2=%%~I"
set "str2=%str2:~3%"
echo %str2%
17 SQL
17.1 MySQL
sql
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SELECT UPPER( "Hello World" );
-- HELLO WORLD
17.2 Oracle
sql
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SELECT UPPER('Hello World') FROM DUAL;
-- HELLO WORLD