Go: package main

import (
	"fmt"
	"strconv"
)

func main() {
	for _, leftValue := range MultiplicationTableNum(9) {
		for _, rightValue := range MultiplicationTableNum(9) {
			strLeftVal, strRightVal, strMulti := strconv.Itoa(leftValue), strconv.Itoa(rightValue), strconv.Itoa(Multiplication(leftValue, rightValue))
			fmt.Println(strLeftVal + "x" + strRightVal + "=" + strMulti)
		}
	}
}

func MultiplicationTableNum(num int) []int {
	multiNum := []int{}
	for i := 1; i <= num; i++ {
		multiNum = append(multiNum, i)
	}
	return multiNum
}

func Multiplication(x, y int) int {
	return x * y
}

C++: #include<iostream>
using namespace std;
int main(){cout<<"1x1=1"<<endl;
cout<<"1x2=2"<<endl;
cout<<"1x3=3"<<endl;
cout<<"1x4=4"<<endl;
cout<<"1x5=5"<<endl;
cout<<"1x6=6"<<endl;
cout<<"1x7=7"<<endl;
cout<<"1x8=8"<<endl;
cout<<"1x9=9"<<endl;
cout<<"2x1=2"<<endl;
cout<<"2x2=4"<<endl;
cout<<"2x3=6"<<endl;
cout<<"2x4=8"<<endl;
cout<<"2x5=10"<<endl;
cout<<"2x6=12"<<endl;
cout<<"2x7=14"<<endl;
cout<<"2x8=16"<<endl;
cout<<"2x9=18"<<endl;
cout<<"3x1=3"<<endl;
cout<<"3x2=6"<<endl;
cout<<"3x3=9"<<endl;
cout<<"3x4=12"<<endl;
cout<<"3x5=15"<<endl;
cout<<"3x6=18"<<endl;
cout<<"3x7=21"<<endl;
cout<<"3x8=24"<<endl;
cout<<"3x9=27"<<endl;
cout<<"4x1=4"<<endl;
cout<<"4x2=8"<<endl;
cout<<"4x3=12"<<endl;
cout<<"4x4=16"<<endl;
cout<<"4x5=20"<<endl;
cout<<"4x6=24"<<endl;
cout<<"4x7=28"<<endl;
cout<<"4x8=32"<<endl;
cout<<"4x9=36"<<endl;
cout<<"5x1=5"<<endl;
cout<<"5x2=10"<<endl;
cout<<"5x3=15"<<endl;
cout<<"5x4=20"<<endl;
cout<<"5x5=25"<<endl;
cout<<"5x6=30"<<endl;
cout<<"5x7=35"<<endl;
cout<<"5x8=40"<<endl;
cout<<"5x9=45"<<endl;
cout<<"6x1=6"<<endl;
cout<<"6x2=12"<<endl;
cout<<"6x3=18"<<endl;
cout<<"6x4=24"<<endl;
cout<<"6x5=30"<<endl;
cout<<"6x6=36"<<endl;
cout<<"6x7=42"<<endl;
cout<<"6x8=48"<<endl;
cout<<"6x9=54"<<endl;
cout<<"7x1=7"<<endl;
cout<<"7x2=14"<<endl;
cout<<"7x3=21"<<endl;
cout<<"7x4=28"<<endl;
cout<<"7x5=35"<<endl;
cout<<"7x6=42"<<endl;
cout<<"7x7=49"<<endl;
cout<<"7x8=56"<<endl;
cout<<"7x9=63"<<endl;
cout<<"8x1=8"<<endl;
cout<<"8x2=16"<<endl;
cout<<"8x3=24"<<endl;
cout<<"8x4=32"<<endl;
cout<<"8x5=40"<<endl;
cout<<"8x6=48"<<endl;
cout<<"8x7=56"<<endl;
cout<<"8x8=64"<<endl;
cout<<"8x9=72"<<endl;
cout<<"9x1=9"<<endl;
cout<<"9x2=18"<<endl;
cout<<"9x3=27"<<endl;
cout<<"9x4=36"<<endl;
cout<<"9x5=45"<<endl;
cout<<"9x6=54"<<endl;
cout<<"9x7=63"<<endl;
cout<<"9x8=72"<<endl;
cout<<"9x9=81"<<endl;
return 0;
}

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

int main(){

for (int i =1; i < 10; i++){
 for (int i2 = 1; i2 < 10; i2++){
  
 cout << i << "x" << i2 << "=" << i * i2;
 }
}
    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>
using namespace std;

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

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++: #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;
	}
}

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

using namespace std;

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

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

C++: #include<stdio.h>

int main() {

	for (int i = 0; i < 10; i++)for (int x = 0; x < 10;x++)printf("%dx%d=%d\n",i,x,i * x);

	return 0;
}

C++: #include<iostream>

int main(){
	int a,b;
	for(a=1;a<10;a++){
		for(b=1;b<10;b++){
			std::cout<<a<<"x"<<b<<"="<<a*b<<std::endl;
			}
		}
	return 0;
			}

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

int main(void)
{
	int l, r;
	for(int i = 1; i < 81; i++)
	{
		l = i/9+1;
		r = i%9+1;
		cout << l << 'x' << r << '=' << l*r << 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 multiplicando=1;
int multiplicador=1;
int resultado;

printf("\n **********Tablas de multiplicar**********");

while (multiplicando<=10)

{

while (multiplicador<=10)

{

resultado = multiplicando * multiplicador;

printf("\n %d",multiplicando);
printf(" * %d",multiplicador);
printf(" = %d",resultado);
multiplicador = multiplicador + 1 ;
}

multiplicando = multiplicando + 1 ;
}
    return 0;
}

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

int main(){
    int i,j;   
    for(i=1;i<10;i++){
        for(j=1;j<11;j++){
            cout<<i<<"*"<<j<<"="<<i*j<<endl;
        }
    }
    return 0;
}

C++: #include<iostream>
using namespace std;
int main()
{
    int i,j;
    for(i=1;i<10;i++){
        for(j=1;j<10;j++){
            cout<<i<<"x"<<j<<"="<<i*j<<endl;
        }
    }

    return 0;
}

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() {
#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<stdio.h>
using namespace std;

int main()
{
	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++: #include<iostream>
using namespace std;

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

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

int main(){

 for(int y = 1; y < 10; y++){
  for(int x = 1: x < 10; x++){
   cout << y << "x" << x << "=" << x*y << endl;
   
  }
 }

 return 0;
}

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

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