Go: package main
import "fmt"
func main(){
    for i:=1;i<10;i++{
        for j:=1;j<10;j++{
            fmt.Print(i)
            fmt.Print("x")
            fmt.Print(j)
            fmt.Print("=")
            fmt.Println(i*j)
        }
    }
}

C++: #include <bits/stdc++.h>
using namespace std;
#define FOR(i, s, n) for(int i = s; i < (int)n; i++)
#define per(i, n) for(int i = n; i >= 0; i--)
#define ROF(i, s, n) for(int i = s; i >= (int)n; i--)
#define FORIT(i, A) for (auto i : A)
#define PRINT(x) cout << (x) << "\n"
#define ALL(a) (a).begin(),(a).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define MP make_pair
#define EACH(i, n) for (__typeof((n).begin()) i = (n).begin(); i != (n).end(); ++i)
#define SZ(a) int((a).size())
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define SORT(c) sort((c).begin(),(c).end())
#define CLR(a) memset((a), 0 ,sizeof(a))
#define NCLR(a) memset((a), -1 ,sizeof(a))
#define dump(x) cout << #x << " = " << (x) << "\n";
#define debug(x) cout << #x << " = " << (x) << " (L" << __LINE__ << ")" << " " << __FILE__ << "\n";
#define sq(n) (n) * (n)
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<string> VS;
typedef pair<int, int> PII;
typedef long long LL;
typedef vector<LL> VLL;
typedef vector<VLL> VVLL;
typedef unsigned int uint;
typedef unsigned long long ull;
typedef priority_queue<int> maxpq;
typedef priority_queue< int, vector<int>, greater<int> > minpq;
typedef complex<double> P;
static const double EPS = 1e-10;
static const double PI = acos( -1.0 );
static const int mod = 1000000007;
static const int INF = 1 << 29;
static const LL LL_INF = 1152921504606846976;
static const int dx[] = { -1, 0, 1, 0, 1, -1, 1, -1 };
static const int dy[] = { 0, -1, 0, 1, 1, 1, -1, -1 };


int main() {
//繝?せ繝医さ繝。繝ウ繝?#ifdef _DEBUG
	printf( "debug\n" );
#endif
	for ( int i = 1; i < 10; i++ ) {
		for ( int j = 1; j < 10; j++ ) {
			printf( "%dx%d=%d\n", i, j, i * j );
		}
	}
	return 0;
}

C++: #include <bits/stdc++.h>

#define int long long int
#define main signed main()
#define bye return 0
#define loop(i, a, n) for (int i = (a); i < (n); i++)
#define rep(i, n) loop(i, 0, n)
#define each(p, v) for (auto p = (v).begin(); p != (v).end(); p++)
#define all(v) (v).begin(), (v).end()
#define prec(n) fixed << setprecision(n)
#define dump(x) cerr << "(L" << __LINE__ << ") " << #x << " = " << (x) << endl
#define clr(x, a) memset(x, a, sizeof(x))

#define sum(v) accumulate(all(v), 0)
#define stlice(from, to) substr(from, (to) - (from) + 1)
#define odd(n) ((n) % 2)
#define even(n) (!odd(n))

#define INF 1000000000
#define MOD 1000000007

#define pb push_back
#define mp make_pair
#define mt make_tuple
#define fi first
#define se second
#define vi vector<int>
#define vb vector<bool>
#define vc vector<char>
     
using namespace std;

main {
  loop(i, 1, 10) loop(j, 1, 10) cout<<i<<'x'<<j<<'='<<i*j<<endl;
  bye;
}

C++: #include <cstdio>

int main()
{
	for (int i = 1; i < 10; i++)
	{
		for (int j = 1; j < 10; j++)
		{
			printf("%dx%d=%d\n", i, j, i * j);
		}
	}
}

C++: //--------------------------------------------------template----------------------------------------//
//c
#include <stdio.h>
#include <time.h>
#include <math.h>
//c++
#include <cstdio>
#include <iostream>
#include <algorithm>
#include <functional>
#include <cstdlib>
#include <sstream>
#include <string>
#include <set>
#include <map>
#include <stack>
#include <queue>
#include <deque>
#include <vector>
#include <complex>
#include <cmath>
//c++11
#include <tuple>
#define all(c) ((c).begin(),(c).end())
#define rall(c) (c).rbegin(),(c).rend()
//#define sort(v,n) sort(v,v+n)
//#define vsort(v) sort(v.begin(),v.end())
#define vvsort(v) sort(v.rbegin(),v.rend())
#define ll long long
#define pb(a) push_back(a)
#define fi first
#define se second
#define inf 999999999
using namespace std;
const ll MOD = 1e9 + 7;
const double PI = acos(-1.0);
//---------------------------------------------------------------------------------------------//


int main() {
	for (int i = 1; i <= 9; i++) {
		for (int j = 1; j <= 9; j++) {
			cout << i << "x" << j << "=" << i*j << endl;
		}
	}
	return 0;
}

C++: #include<stdio.h>
int main(){
	int i,j;
	for(int i=1;i<=9;i++){
		for(int j=1;j<=9;j++){
			printf("%d*%d=%d\n",i,j,i*j);
		}
	}
	return 0;
}

C++: class Main
{
    public static void main(String[] args)
    {
        for (int i = 1; i <= 9; i ++)
        {
            for (int j = 1; j <= 9; j ++)
            {
                System.out.println(i+"x"+j+"="+i*j);
            }
        }
    }
}

C++: #include <iostream>
using namespace std;

int main() {
  for (int i = 1; i <= 9; i++) {
    for (int j = 1; j <= 9; j++) {
      cout << i << "x" << j << "=" << i * j << endl;
    }
  }
  return 0;
}

C++: #include <iostream>
using namespace std;
int main() {
	for(int i=1;i<=9;i++){
		for(int j=1;j<=9;j++){
			cout<<i<<"x"<<j<<"="<<i*j<<endl;
		}
	}
	return 0;
}

C++: #include<stdio.h>
int main()
{
int i,j;
for(i=1;i<=9;i++)
{for(j=1;j<=9;j++)
printf("%d*%d=%d\n",i,j,i*j);}
return 0;
}

C++: i;main(j){for(;++i<=9;)for(j=1;j<=9;)printf("%dx%d=%d\n",i,j++,i*j);exit(0);}

C++: #include <cstdio>

int main()
{
	int a,b;
	
	
	for(a=1;a<10;a++)
	{
		for(b=1;b<10;b++)
		{
			printf("%dx%d=%d\n",a,b,a*b);
		}
	}
	
	return 0;
}

C++: #include<iostream>
using namespace std;

int main(){
	for(int i=1;i<=9;i++){
		for(int j=1;j<=9;j++){
			cout << i << "x" << j << "=" << i*j << endl;
		}
	}
	return 0;
}

C++: #include <iostream>
#include <cstdio>
 
using namespace std;
 
int main()
{
  for(int i=1;i<=9;i++){
    for(int j=1;j<=9;j++){
      printf("%dx%d=%d\n",i,j,i*j);
    }
  }
  return 0;
}

C++: #include <iostream>
using namespace std;

int main() {
    for ( int i = 1; i <= 9; ++ i ) {
        for ( int j = 1; j <= 9; ++ j ) {
            cout << i << "x" << j << "=" << i * j << endl;
        }
    }
	return 0;
}

C++: #include <cstdio>
using namespace std;
int i,j;

int main(){
for(i=1;i<10;i++){
	for(j=1;j<10;j++){
		printf("%dx%d=%d\n",i,j,i*j);
	}
}	
return 0;
}

C++: #include<iostream>
using namespace std;
int main()
 {
    int i,j;
    for(i=1;i<=9;i++)
      {
        for(j=1;j<=9;j++)
            cout << i << "x" << j << = << i*j << endl;
      }
    return 0;
}

C++: #include<iostream>

using namespace std;

int main()
{
	for(int i = 1; i <= 9; i++){
		for(int j = 1; j <= 9; j++)
			cout << i << "*" << j << "=" << i * j << endl;
	}
	
	return 0;
}

C++: #include <iostream>
#include <cstdio>
#include <algorithm>
#include <cassert>
#include <vector>
#include <string>
#include <cmath>
#include <map> 
#include <sstream>
#include <cstdio>
#include <complex>
#include <cstring>
using namespace std;
 
const int MAX= 10000100;

#define loop(i,a,b) for(int i = a ; i < b ; i ++)
#define rep(i,a) loop(i,0,a)
#define all(a) (a).begin(),(a).end()
#define ll long long int
#define gcd(a,b) __gcd(a,b)
#define pb(a) push_back(a)
int GCD(int a, int b) {if(!b) return a; return gcd(b, a%b);}
int lcm(int a, int b) {return a*b / gcd(a, b);}

int main(void){
  rep(i,10)rep(j,10)cout<<i<<"x"<<j<<"="<<i*j<<endl;
}

C++: #include <iostream>
using namespace std;

int main() {
	for(int i=1;i<10;i++)
	{
		cout<<i<<"x"<<i<<"="<<i*i<<endl;
	}
	return 0;
}

C++: #include<iostream>
using namespace std;

int main(void){
    int i;
    int j;
    for(i = 1;i < 10;i++){
        for(j = 1;j < 10;j++){
            cout << i << "x" << j << "=" << i*j << endl;
        }
    }
}

C++: #include <iostream>
using namespace std;

int main(void)
{
    int i,j;
    
    for(i = 1; i <= 9 ; i++)
    {
        for(j = 1 ; j <= 9; j++)
        {
            printf("%d x %d = %2d \n",i,j,i*j);
        }
        printf("\n");
    }
    
     return 0;
}

C++: #include<iostream>
using namespace std;

int main(){
    
    for(int i=0;i<=9;++i)
    {
        for(int j=0;j<=9;++j)
        {
            cout<<i<<"x"<<j<<"="<<(i*j)<<endl;
        }
    }
    return 0;
}

C++: j;main(i){for(;i<=9;i++){for(j=1;j<=9;j++){printf("%dx%d=%d\n",i,j,i*j);}}exit(0);}